guy 1: dude, did you hear what happened to brad at the camp?  guy 2: yeah, i heard sean gave him a captain's hook
the act of sticking your index finger into your anus, getting poop on finger, and digging your fingernail into your friends cheek leaving the poop in the hole
"guy 1: dude, did you hear what happened to brad at the camp?  guy 2: yeah, i heard sean gave him a captain's hook" What is the definition of "captain's hook"?