What is Fdf?
1.
First Date Face - Someone who just looooves to give face / eat pussy / dine at the 'Y' / muff-dive / munch cunt / perform cunnilingus / etc., etc., on the first date (or most likely, anytime at all) - Yummmm.
She: I hear you're an FDF!
He (or she): Oh, yeah... I'd absolutely love you to sit on my face tonight - just get it aaaaaall wet (and extra points if yer a squirter)!
See
2.
Short for First Date Fuck.
Dave: "Hey, John was that girl you were with a FDF?"
John: "Hell yeah. She gave it up the very night I met her."
See