SILF

Substitute I'd Like (to) Fuck

Johhny: "Did you see that math substitute today?"

Mark: "Yea, dude, she's a total SILF!"

by jjobin@99 February 14, 2011

SILF

Baily and/or Ridgly (Sisters of Smapdey). Also see the The B&R

Boy, smap's sister's are deffenately silfs. Especialy those tits and edible training bra!

by Chester January 11, 2005

Silf gilf

🦅🦅🦅🦅🦅🦅🦅

“Oh my god that picture is so Silf gilf”

by buttetfly2618 May 13, 2022

Silf

a fb shitposter you’d like to fuck
“shitposter id like to fuck”

“dude do you know this person?”
“yeah hes a silf”

by yergothdad May 07, 2020

Silf

Someone I’d like to fuck

Jeez Gus is such a silf😫🤤

by Olivia & Keira May 12, 2021

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 09, 2019

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