2. When someone is taking a toke out of a pipe and you punch the bowl, in an attempt to bring contact between the toker's face and the burning weed! Only do this when the weed is some dirty shwag, or risk losing some nice grass.
2. Cuno: How did you get that burn on your face?
Pita: That ass Mark punch bowl'd me yesterday, and it was MY fucking weed!
"Yeah, dude. That was some punchbowl shit, right there."