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Bailey and Ridgely, silf=sister-i'd-like-to-fuck.
Dude, the silf is rockin'
by kate January 11, 2005
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SILF

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"BustedTees aint SILF..."
by An0nymous..... June 7, 2009
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SILF

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my sister is a SILF
by SexualityChecker July 18, 2018
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SILF

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by An0nymous..... June 7, 2009
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silf

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That sub at Quizno's is a SILF.
by Freakinhuge May 17, 2006
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Silf

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Sister I would like to fuck.
much like Milf, Gilf, Dilf(dad),Dilf (dog),Dilf(donkey)Cilf(child),Bilf,Cilf(cat)or any other farm animal.
Person 1:OH MY GOD, look at that chick.What a SILF.
Person 2: Dude, thats YOUR sister. That's nasty.
Person 1: It's called SILF for a reason dude. DUUU
by ill bang ur sister! December 8, 2004
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silf

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dude, shack had some serious silf last night. He's still pissed off
by i banged your mom December 9, 2008
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