Theinfamousjim's definitions

Y'masm

A combination of yer ma and orgasm. To give a female parent an orgasm. Note: this does not refer to your own parent specifically, it could be any female who is a parent.

Bob-"I gave a y'masm last night"
George- "Dude! That's my mum!"

by Theinfamousjim September 11, 2009