What is I Had Yer Grandma Last Night?
1.
It litterally means "I had sex with your grandmother last night."
It just removes the word 'sex' to make it shorter, like any other slang term.
Ryan: "Yo man, what were you doin' last night?"
Jack: "
I had yer grandma last night "
Ryan: "What the hell man?! That's sick!"
See
Random Words:
1.
A person with a big, hair induced ego.
"See that guy over there. He's gone Spooky Luke"
See spook, spooky, luke, lukey..