SILF

Sister id like to fuck. Your best friends sister that you just wanna fuck like a horny dog until she cant take any more

dude, your sisters such a silf. I rode her all last nite

by silfassfucker January 10, 2009

sfilf

Sister's Friends I'd Like to Fuck.

-"the sfilf was seventeen...and i was twelve."
-"OAAh..."
-"Yeaaah!"

by The_Baker December 19, 2006

Silf

Sister I'd LOVE to fuck

Erin's sister is SUCH a silf;)

by erinssisterlover101 June 9, 2009

SILF

A person's sister you will like to fuck

I told my friend he had a silf

by ApocalypticaX November 1, 2009

Smilfed

To get the shaft or get screwed over.

John got a raise in pay, I got nothing. I just got smilfed.

by Phil Deeze January 19, 2010

silf

Sheep I'd Like To Fuck

Commonly Used in Wales

Welsh Farmer: oh, thats a mighty fine sheep
Welsh Farmer b: yes it is a silf.

by ROBERT SAVAGE July 8, 2006

silf

Sissy I'd Like To Fuck, S.I.L.F

"Damn, that is one SILF I would like to fuck."

by ChriT January 12, 2017