Butter Jumpers 

someone who jumps young women and slathers thier vagina in butter in order to steal thier wallet out of it.

suzie is walking down the street.... suddenly someone butterjumps her! thus knocking her down and pulling her pants down to get to her vagina.
Then she screams "Oh no! hes a butter jumper!!! i hope there arent any more Butter Jumpers!!!" :O

Butter Jumpers by numba1buttajumpa June 5, 2011

Buttery Jumper 

1) A 'buttery jumper' is slang for a homosexual male, originating in southern Birmingham - it is not in heavy mainstream use, but is rising in popularity.

2) When one simply makes a toastal mistake, rendering one's jumper slightly covered in butter or margarine.

"You see that guy, James, he has a 'buttery jumper'"

Buttery Jumper by Jim Ratcliffe November 17, 2007