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!

SILF by Chester January 11, 2005

SILF 

Per an application (Naughty Gifts) on the facebook: a "Sheep I'd Like to Fuck"

On Brokeback Mountain, Jack's ass was not the only thing that Ennis lusted for. There were a multitude of SILFs to deflower and so Ennis brought a new "silence" to the lambs.

SILF by theportangel June 13, 2008

SILF 

Slut I'd Like to Fuck

Despite sluts are possibly diseased, it doesn't stop me from fucking them. All I have to do is put on a rubber. If they're ugly, no brown paper bag or rubber. The hot sluts are always a SILFs.

SILF by Jamesbobond August 20, 2011

SILF 

SILF(Sister I Liked To Fuck) typically can be a term used as a friend's hot sister or a girlfriend's sister

Jerry:man Victoria's older sister is a SILF man there are so many things I would do to that piece of ass. Marcus:dude I know and I'm Victoria's study partner for physics and all I do is stare at her sister the whole time.

SILF by Mayorofpoundtown February 28, 2014

SILF 

(High school) Senior I'd Like to Fuck.

Similar in concept to MILF.

OMG! He's totally a SILF!

SILF by TotesMcGoatsAFILF May 1, 2014

SILF 

A Smurf I'd like to Fuck

She's a total SILF

SILF by TJ34 April 19, 2018

SILF 

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

Dayumm your sister really is a SILF.

SILF by BlazeItDude March 7, 2018