Sexually Frustrated; Feelings of defeat and discouragement concerning one's sex life.
I haven't had sex in five months... I'm completely and utterly SF.
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Dreaded and feared by all, this monster-byatch does not deserve to live.
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Special Forces. Used in the military and miltary wannabes.
rick: Dude i wanna be SF when i enlist.
Dude: You're hardcore.
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SF means Saturated Fat
it can be woman or man, usually fat ugly and full of themselves...literally.
please see third paragraph down on "c dub" for further clarification
yo did you see SF today? she ate my Doritos and drank all the beer and now shes all over my boyfriend!
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