Off G.P is short for "Off General Purpose" - to do something you don't necessarily have to but would be practical given the situation and/or circumstances; just because.
A) It's not a special day but I love her so I bought her flowers off gp.
B) I don't know? Craig is usually pretty cool but see that guy over there...he's coach's son. Er'body say he's been getting over and talking mad shit all season. So when he tried that mess at the party last night...instead of walking away, I guess Craig just beat his ass off gp.
A low-class, urban female or male who displays very little to no morals or self-respect that happens to live in an impoverished neighborhood. The Caucasian variation of the Hood Rat are known as Trailer Trash.
A) SABRINA on Madea's Big Happy Family (Byyyreeeeen!!!)
B) Hood Rats are always on the Maury Show getting paternity tests done.