silf 

Sister I'd Like To Fuck

I was like hey wargo, he goes what do you want, I said besides your sister and then he threw a sandwich at me in disgust

silf by Ruben Mothballs June 15, 2003

Silf 

A silf is a "sister i'd like to fuck". it is the same idea as a milf. Silfs are usually absolutely georgous, sexy, irresistable, and extremely flirty

Guy 1: "Dude you have to meet my sister Alie, she's a total silf"

Silf by alwaysaladybug February 22, 2011

SILF 

Squirrel I'd Like to Fuck

Sandy Cheeks is an underwater SILF

SILF by {W@R} April 16, 2006

SILF 

SILF or SILFing. Self Inflicted Laughing Fit.

A SILF occurs when you do or think about something that amuses you so much you have a laughing fit. You might send a text to a friend that makes you collapse on the floor with laughter.

"I just handed out brochures whilst doing the chicken or beef dance to the theme tune of Air Crash Investigators. hahaha tears! I just SILFed myself!"

SILF by VIK&GABS March 6, 2014

SILF 

Shrimp I'd Like To Fuck

Hey Jim, check out the whiskers on that small pink slightly curved sea dweller! A regular SILF and no mistake! High five!

SILF by Roger McTodger November 16, 2004

SILF 

Skeleton I'd Like to Fuck (S.I.L.F.)

Omg that one character from that new game is such a Silf

SILF by Mr. Skully January 13, 2019

silf 

Sister, I'd like to fuck (you like a wild animal)

Silf is the shit.

silf by Big Tool December 25, 2003