Crab Boil
Basically it's when you motor-boat someones butthole. A sexual partner places his/her lips inside the butt crack of their partner and exhails forcefully while turning head from side to side. This will generate a motor-boat like sound.
"Stacy quivered with excitement as Jennifer crab boiled her naked ass crack"
Philadelphia Crab boil
When you're in Philadelphia and you are getting head from someone. Right when you're about to cum, you scream your own name, then you cum on the persons face, blow a handful of old bay seasoning into their eyes, and then slap them with a cheese steak.
"I had some old bay left over, so I went to pats and gave that bitch the ol Philadelphia crab boil.
Boiling Crab
THE best place to eat on earth..You would give up your balls for even a small sip of that juicy tender crawfish and small bite of theor tantalizing cajon fries!
GIVE ME BOILING CRAB BIIITCH!!!!
Crab Boil
The act of farting on someone while they are locked in a dog crate.
Ry locked himself in the dog crate, so I gave him a crab boil.