acronym for sister i'd like to fuck. derived from milf another acronym this time for mother id like to fuck.
damn phil's sister is a fucking silf
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"Hey Partel, see that fit smurf over there?"
"oh yeah that's a real silf"
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Sister or Sister in-law I'd like to fuck
Hey Brandt, your Sisterin-law is a SILF!
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Amanda Beard
I heard Amanda's posing nude in Playboy, what a SILF!!!
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lonely farmer: damn look at that SILF
sheep: baaaaaah
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