means to spill someones secrets aloud; to put someone on blast; to tell everyone in the vicinity what someone is trying to sneak and do
Classroom full of people,

Earl: (whispering) Man I got so high last night!

Tyrone: (talking really loud) Whaaat, You got high last night, man why you didn't call me?

Earl: Man why you gotta be loud cappin me like that?
by MsDesyBaby October 2, 2010
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Speaking on some ones name like they bout it or talking too loud.
Him: MARCUS AINT GONE PUT A HAND ON ME!
Her: He always loud cappin.
by Mariheartz March 23, 2019
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