A phrase originating in St. Therese science class, after a marine-biology video.
1 to punch some one or something dangerous
2 to do something incredible
3 to masturbate
4 Take a dump
1 "Wow, he just went up and punched a shark!"
2 "After he jumped over Charlie Sheen, everyone said 'jimmy punched a shark'"
3 "after his date Sean went home and punched a shark"
4 "after the buffet i punched a shark"