An exaggerated version of no cap
Kevin: Bruh i just took the largest dump ever no kizzy on the cap
Steve: Nah this aint it
n: when it's cap, but it's, like, REALLY cap, and you can't believe it's true for the life of you.
Josh: Yo I got in Harvard!
John: Nah that's KIZZy cap bro no way, you got like a 2.0 GPA
Josh: Sheesh bro can't take a joke?
This is a term used when someone is capping so hard, that they must add the kizzy to the front to show just how unlikely the situation is.
"I like totally just rizzed up your daughter Mr. White," said Jesse. "Nah fam, you is definitely kizzy capping rn, said Walter."