The action of one flipping a water bottle, causing it to land on its cap
Dude, that kid just capped the bottle four times in a row!
p1 - "Broooo some guy jumped out of a plane while doing a backflip and 360 noscope with a 148 javelin missle."
p2 - "Cap."
Cap is problem. To cap is to cause/give problem to (someone or something).
Ey bro, we need to pull up and cap the guy who's messing with my gal