Verb
cap on (third-person singular simple present caps on, present participle capping on, simple past and past participle capped on)
(transitive, slang, originally African-American Vernacular) To spread caps (lies) or false rumors (about someone); to slander.
That guy is always capping on me—don't believe a word he says.
A salute from this corner to President Bush for saying he was willing to investigate raising or eliminating the cap on salaries subject to the Social Security tax. Nick Clooney
I put a Phrygian cap on the old dictionary. Victor Hugo
When I'm traveling on tour, one of my favorite things to do is to throw a baseball cap on and go to a Target. The company has always been good to me. They've got such a great creative team. Christina Aguilera
I think you know grandchildren now don't write a thank you for the Christmas presents that are walkin' on their pants with their cap on backwards, listenin' to the Enema Man and Snoopy Snoopy Poop Dogg and they don't like 'em. Alan K. Simpson
I don't want to be carried out of a club wearing a tie-dye T-shirt and a cap on the wrong way around when I am 70, but I would like to settle down a bit. Maybe with a partner. Rupert Everett
The dreaming man makes excuses for his inaction and places a fools cap on his head. Moroccan Proverb