It means you be lying. So like if you say something like I killed somebody yesterday and said later that you was fucking a hoe, someone you told that bullshit to, will say you be cappin
You: my side bitches Bianca and shonda'laquesha was getting fucked yesterday and this other side hoe showed up and I shot her.
Jon Jon: nigga you be cappin now stop lying before I take yo side bitches and yo momz
another term for a station wagon, mini-van, or any other kind of vehicle that is targeted at the "family" demographic(also M.A.V.)
"Tactical advantages aside, the M.A.V. is top of the line for the holy warrior troop transport manufactured by the Church of Latter Day Saints Military Industrial Complex. Also great for family trips...to heathen lands."
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.