usfb

Best definition
usfb
Under Skirt Finger Bang. Surreptitious digital penetration beneath a free-hanging garment extending from the waist down. Sticking in your finger under cover of concealing clothes. Sneaking a quick, hidden sexual act. Noted in Wonkette.
You can’t see it, but that dude’s other hand is pulling the USFB.

I didn’t go for the usfb, but there was a bit of over the pants rubbing.

usfb: define #2
USFB
Under Skirt Finger Bang. From one of the first posts on LastNightsShots.com.
I’d USFB her. And her friend.

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