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1.
EF
Polite way to say the word "Fuck."
Hey Gary, go ef yourself you dumb mother effer.

Hey Gary, I just effed your girl.
by Robbyaga July 20, 2003
 
2.
EF
EF stands for Epic Fail, something that you may be too.
A: Hey, look, I made a new banner for my forum! Do you want to see it?
B: Ok.
A : So what do you think about it?
B: It's an EF. >_>
by CuchiiDealer June 16, 2010
 
3.
EF
European language schools organisation. Nobody know's what EF actually means although, having lived in Oxford - an EF stroghold - for a number of years I can only assume it stands for 'Easy Fuck.
Did you see those Italian EF girls getting off the coach? Man, sometimes it's good to live in this shithole wanker-student city!
by Miles Pieri January 23, 2004
 
4.
EF
Stands for Erectile Function, anybody who doesn't have ED can have EF, it means you are able to hold an erection without Viagra, Cialis etc.
Guy1:I have ED
Guy2:well that sucks, I have EF
Guy1: Man, I wish I had that.
by RAMS57 March 05, 2009
 
5.
E.F
1) a child with a face like it has down syndrome.
2) one fugly ass bitch
dude1: "hey did you see that new down syndrome girl in our school?"
dude2: "oh yeah, E.F., right? shes supposed to be 'normal..'"
dude2: "yeah, okay, dude! lets go put her back in the hospital where she belongs!"
by madison,nj+summit,nj=death September 30, 2009
 
6.
E-f
fundamentally, an electronic announcement of a boyfriend/girlfriend. phonetically, rhymes with 'bf'. usually referred to as in the context of a relationship status on a social networking site, i.e. facebook, myspace.
hey, did you hear about bree's new e-f?

yeah they've been going out for a while but she just changed her status on her facebook to in a relationship.

wow, they must be getting serious
by DanielWebz July 22, 2009
 
7.
ef
slang for f or fail.
ef, efff, eeff
by asfd777 October 05, 2011