What is Your Sister?
1.
The person all your guy friends want to fuck when they realize she isn't just yur little sister any more- she's your little virgin sister who is hot now that she has boobs and shaves her legs.
"Damn! Your sister is hot! When did that happen!?!?"
"Dude as your best friend, would it be weird if I fucked your sister?"
2.
where plenty of penises get stored.
3.
One hot piece of ass. Penises can be found in her mouth, pussy, and ass.
Damn, your sister is hot!
See
4.
another name for a person who you "realy like" and want to tell joke about without her knowing...
look how much your sister is eating...
