by lolarainbow September 26, 2010

by Dianna Cole July 8, 2006

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.
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.
by hug2002 February 8, 2019

silf a american slang word meaning sock id like to fuck because average men usually cum in socks so sock id like to fuck.
by nigger + nigger April 8, 2022

John:”Bro Addison Rae is so hot!!”
Max:”Yeah bro she’s a bad SILF”
John:”What the fuck is SILF?”
Max:”Sister I’d Like To Fuck”
Max:”Yeah bro she’s a bad SILF”
John:”What the fuck is SILF?”
Max:”Sister I’d Like To Fuck”
by MikeOxlong_v2 May 24, 2020

"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.
Boy #2: They are both silfs dude!
Girl #1: You guys are both right! They are silfs.
by Brainrotgobrrrr April 26, 2021

by TotesMcGoatsAFILF May 1, 2014
