Figured I'd make one since some of them are confusing and might not be immediately obvious. Please add any that I've missed!

1) Randomized Wallbuys- Wallbuys will give you a random gun when you purchase them
2) I Didn't Get a Turn- Immediately makes the box pull a teddy bear.
3) Given The Team Another Chance- kills all zombies and starts the round over
4) Unlimited Perk Slots- can buy unlimited perks for the duration
5) Martyrdom- drops a grenade at each player's location
6) Explosive Zombies- zombies drop grenades that immediately explode on death
7) Who Didn't Pay the Electric Bill?- Disables power, any perks that rely on power will not function (If you have Mule Kick you will lose your 3rd gun). Perks that don't will still work. (this may not be intended)
8) Budget Cuts- takes away half of each player's points
9) Spawn Red Carpenter- Spawns a red Carpenter drop. If a zombie touches it, all barriers are taken down.
10) Spawn Red Max Ammo- Spawns a red Max Ammo. If a zombie touches it, you current clip is emptied.
11) Spawn Red Perk Bottle- Spawns a red Perk bottle. If a zombie touches it, you lose a random perk (does nothing if you have no perks)
12) Spawn Red Bonus Points- Spawns a red Bonus Points. If a zombie touches it, you lose a random amount of points.
13) I'm Feeling Lucky- Spawns a random powerup
14) Zombies Loose Random Limbs- Exactly what it says
15) Unlimtied Power!- Every zombie drops a powerup
16) Who's Shooting?- Makes random gunshot noises around the player
17) Where's that zombie?- Makes random zombie sounds around the player
18) Give Random Weapon- replaces currently held weapon with a random one
19) Freeze Time- stops time like the Killing Time gum
20) Timeshare Perks- Temporarily gives a random perk
21) Newtonian Negation- Zombies fly up when killed
22) Take Random Perk- Takes a random perk from each player (If you lose Quick Revive on solo, it counts as one of your 3. If you lose Mule Kick you will lose your 3rd weapon.)
23) I'm Broke- makes characters spam their lines for when they can't buy something.
24) Kill All Zombies In Sight- Kills every zombie you can see
25) Makeover!- Gives your guns a new camo (doesn't work well with custom guns)
26) Fake Crash- makes a Windows error sound and black screen for a few seconds. The game freezes during this time.
27) What is This, Black Ops 4?- Displays a PS4 crash screen. The game freezes during this time.
28) This Doors On Me- Buys a random door for you. (Doesn't seem to reliably work especially on custom maps)
29) Upgraded Mystery Box- Box guns will be PAPed when obtained for the duration
30) Upgraded Wallbuys- Wall guns will be PAPed when obtained for the duration
31) Caffinated- Significantly increases player walk speed
32) Sugar Tax- Perks cost double for the duration.
33) Invincibility- cannot be hurt for the duration.
34) Lost Its Flavor- Takes away current Gobblegum
35) Bottomless Clip- shooting will not consume ammo
36) Eww, Cooties- Zombies ignore all players
37) I thought you had the zombie?- Kills all zombies and ends the round.
38) Sounds Like Someone's Breaking In!- Not 100% sure but I think this takes down all barriers.
39) Double Points- Doubles your current amount of points
40) You've Gotta Be Kitting Me- Applies random Weapon Kit attachments to your gun. Usually doesn't work with modded weapons.
41) Origins Mud- Disables sprinting and sliding for the duration
42) Old Fashioned- applys a ragtime filter for the duration
43) Aiming Disabled- cannot aim down sights for the duration.
44) Literally Nothing- No effect
45) Zombies Walk- Sets all zombies' speed to walking
46) What's The Point?- Point counter will not update for the duration, when it ends you be able to see your actual point count again.
47) Fake Samantha Glitch- takes away some points and switches guns like the "Samantha Glitch", then gives them back.
48) Crawlers!- Turns all zombies into crawlers.
49) Random Gumball- consumes a random Gobblegum. You will not lose any gums consumed by the mod.
50) Unpap gun- If you are holding a PAPed gun, makes it normal again. Has no effect on normal guns.
51) Free PAP- Makes your gun a PAPed gun if normal. Has no effect on PAPed guns.
52) Random AAT- If you are holding a PAPed gun, gives it a random AAT. Has no effect on normal guns.
53) Reset AAT- If you have a PAPed gun with an AAT, takes the AAT away. Has no effect on normal guns.
54) My X Key Is Broken- Cannot swap weapons for the duration.
55) Disorderly Combat- Grants the Disorderly Combat gum. For 5 minutes you get random guns and do not need to reload them.
56) BO2 Slide- Cannot slide for the duration
57) Randomize Door Prices- Doors have random prices, generally they become more expensive.
58) I found Jugg!- Teleports Juggernog to a random player.
59) Powerups Flee Players- When a player gets close to a powerup it moves away. You can catch them but it is very difficult. Works on Red Powerups as well.
60) Extra Zombies- spawns in more zombies
61) Powerups Last Forever- Powerups with a timer such as Double Points or Instakill will last the entire duration of this effect and a little while afterwards.
62) Randomized Perk Locations- randomly swaps every perk's location with the other perks.
63) Can We Get a Perk Jingle?- Plays a random Perk Jingle
64) Extra Crispy- Makes a fire effect appear on screen, it is cosmetic only.
65) Out of Body Experience- Puts the player into 3rd person
66) Remove Current Clip- Takes away the ammo of player's current clip, making them reload.
67) Hardcore- Disables all HUD elements
68) Need a Little Revive?- Makes Quick Revive small
69) Anti Point Grind- Takes away points when you gain points
70) It's a Trap!- Activates all traps
71) Random Teleport- warps you somewhere randomly like Anywhere But Here
72) Friendly Fire- Turns on friendly fire (you can damage your teammates)
73) Turn Around- Makes players face the opposite of wherever they were facing when the effect happened
74) Swap Places- players randomly swap places with each other
75 Headshots Only- Zombies can only be damage by attacks to their heads
76) I Need Glasses- blurs player vision
77) Tone Death- Makes funny sounds when zombies die
78) Communism- not entirely sure what this does
79) Cyberpunk 2077- All zombies have no animations and no heads