silf

a sister who is hot, basically a milf but a sister (silf)

person 1: ay! is your sister a silf?

person 2: uh ig...

by ursisterisasilf October 5, 2021

SILF

The abbreviation of "Sister I'd like to Fuck", used when a sister of someone is very hot.

Man, Tanner's sister is such a SILF

by thegreathenrylpa January 7, 2022

SILF

Sister I'd Like To Fuck

When your best friend's sister is so hot that you actually want to date them.

If they have a hot brother it is known as a BILF.

Oh my god, did you see Jackson's sister, she's such a SILF!

by hug2002 February 8, 2019

SILF

Scarf I'd Like to Fuck
when you see a woman wearing a pretty scarf and you like the look of the scarf so much you want to take it home, have sex with it and ejaculate into or over the scarf

"did you see that blonde woman wearing the red and white polka dot scarf ?"
"that's definitely a SILF!"

by da wrong dooerflgflgkbjlfkgbml July 9, 2018

Silf

Stepmom id like to fuck

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

So?

by Romaniwandastan May 27, 2023

SILF

Stands for Sister I'd Like (to) Fuck.

Dayumm your sister really is a SILF.

by BlazeItDude March 7, 2018

Silf

Means “Sister id like to fuck”

Hey Silf is that okay?

by xkloudii December 23, 2019