A slang term commonly used by members of Gen-Z to say that something is a lie. Similar to its variation “capping”, which is used to direct at another person who is a liar.
Person 1: Mom! Nick ate my ice cream!
Nick: That’s cap!
Variated:
Teacher: Jack, are you sure your dog ate your homework?
Jack: Yes!
Bob: You’re capping, Jack! I saw you throw it in the recycling bin yesterday!
Nick: That’s cap!
Variated:
Teacher: Jack, are you sure your dog ate your homework?
Jack: Yes!
Bob: You’re capping, Jack! I saw you throw it in the recycling bin yesterday!
by ChickenScrxtch82 January 3, 2021
Get the Capmug. by misscherrypop December 30, 2009
Get the cappedmug. by zilenzer October 7, 2008
Get the capmug. In Cleveland, 9 times out of ten it means to lie, front or bullshit. In noun form, a liar, or bullshitter.
Girl 1: I went to the mall and this dude gave me a discount on my Forces cuz I told him he was cute.
Girl 2: You cappin'!
- - - - - - - - -
Boy 1: Last Saturday, I got pussy from 3 different girls.
Boy 2: Man, youse a cap.
Girl 2: You cappin'!
- - - - - - - - -
Boy 1: Last Saturday, I got pussy from 3 different girls.
Boy 2: Man, youse a cap.
by AUTOPSY January 12, 2007
Get the capmug. 

