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a) F-Y-F = Fuck Yeah, Friday!!
b) the morning of a friday, where one realizes how much entertainment the upcoming weekend has to offer.
let's say you go to bed thursday night, just one more day of school and you know of a fucking sweet party that next night! you wake up friday morning for school, turn off the alarm, sit up and think to yourself..."F-Y-F....FUCK YEAH, FRIDAY!!" and then the rest of the day goes by better knowing that it's fuck yeah, friday!!
F-Y-F by jan_the_man October 21, 2010
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Selena: Babe I love you!
Luis: F.Y.F bitch I only love Pussy
Selena: Fuck you then F.L.I.P

Luis: GTFO out my car Slut!
Selena: asshole =(
F.Y.F by iM rEAL December 7, 2009
It is an abbreviation for telling another person to fuck their own face. It stands for "F.uck Y.our F.ace." A person who is using this expression may state the letters as "F-Y-F" or pronounce it as one word as "fyf" which rhymes with the word "life."

F.Y.F. is derived from telling somebody "to take a step back and literally fuck your own face"
Justin: "You know Rob, you are a total douche bag!"
Rob: "Well you can go F.Y.F."

An angry and pissed off Tom Cruise would respond with: "Now I want you to take a step back... and literally fuck your face!"

"Why don't you go and fyf?"
F.Y.F. by iSHREDonGuitar87 December 30, 2009

F.Y.F.O. 

A synonym for; Fuck Your Face Open. A term used during extreme periods of anger but generally little to no threat is ever perceived.
A.J. - do it again...I dare you. F.Y.F.O. Motherfucker
F.Y.F.O. by F.O.S.F.F. 7O01 April 20, 2015

F.Y.F.I.B 

F.Y.F.I.B Never speak to me again
F.Y.F.I.B by Aurbo3 March 9, 2017

L.m.f.y.f.u.I.c.o.I 

Let me fuck your face until I cum on it
Only freaks understand this “L.M.F.Y.F.U.I.C.O.I
L.m.f.y.f.u.I.c.o.I by Youfmu December 14, 2021
An acronym for have you ever fingered yourself.
Hey Jessica Tom wants to know H.Y.F.Y
H.Y.F.Y by Dddylongshlong February 17, 2019