SILF

"SILF" is an acronym for "Sister I'd Love to Fuck", which means someone's sister who'd you like to have sex with.

Boy #1: Gosh- Lily's sister is such a silf!
Boy #2: They are both silfs dude!
Girl #1: You guys are both right! They are silfs.

by Brainrotgobrrrr April 26, 2021

Silf

A hot older sister.

"Mann your sister is such a silf"
"what the fuck shes my sister"

by Jocelyn the Helicopter June 4, 2021

Silf

Stepmom id like to fuck

Damn Lars stepmom is a silf
Ain’t you a girl

So?

by Romaniwandastan May 27, 2023