cap 

A cap is when another person is lying and you know it.

"I fuck yo mom"
"cap"

cap by Niggatonimemes December 6, 2019

cap 

You might be thinking of kapp or kappa, the twitch emotes used to call someone's bluff or accuse them of lying

Dumbass: "Yah dude and I was the best player they had. No one could beat me" Me: "kapp (cap), you were not" or simply "kapp"

cap by guest_2 December 7, 2019

Cap 

Cap, Cap means to lie or some people use cap instead of dare like if someone says they will do something and you don't believe them you would say "thats cap" or you could say stop capping

You wont that's cap
You wont do that stop capping

Cap by Ezy Shots December 7, 2019

Cap 

A lie or when someone’s making something up

random guy: Yooooo i just won 163million dollars
me: stop playin...that’s cap

Cap by Yourmomgay4thedat February 1, 2020

Cap 

A word for lying or not telling the truth, mostly in a outrageous way.

Joe: I swear you're garbage at everything you even think about doing

Zach: you're capping so hard it's unbelievable

Cap by BigPanther February 2, 2020

cap 

(v) to lie. a word stupid kids use because they are stupid.

Mainly used by Gen Z population. A lot of times they see their friends use this word, so in an attempt or to be cool and with the “in-crowd” they use it too. Conformity at its finest.

I’m the greatest. No cap.

cap by mmv3 February 8, 2020

Cap 

To falsify or be misleading on a topic or subject
-Brock Weidman

Tom: “Dude that Alligator was 10,000 pounds”
Brock: “That’s not true, that’s cap!”

Cap by capcreator February 11, 2020