A therm related to gang culture.
Blood in . To get into a gang, you got to spill some blood, usually murder.
Blood out - The gang is for life. The only way to get out is to die.
-Man, Don't mess with those guys, they're blood in, blood out.
S.O.A.P. stands for Snakes On A Plane.
Dude, It's S.O.A.P., man, S.O.A.P!