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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
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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
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3
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
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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
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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
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Ef, or Effff, depending on one's level of enthusiasm, is an abreviation for "F.I." which is an abreviation for "Feeling It", typically used to describe being into an experience or a person.

One can also be Triple F.I., or simply Triple.
"How was lunch?"

"I was so ef!"

Or "Did you see that chick? She was so ef!!" "Oh shit, I missed her, she was ef?"
"Ugh, I was triple ef!!"
"Eeeeeehhhhffff!"
"Eeeehhfff!"
"Triple!"
by ImFeelingIt July 30, 2018
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Simply the letter f(F) to name the letter F \ef\.
"When speaking of the letters written by the cleric, the historian noted the letters aitch and ef were printed heavily"
by Timothy JD W January 12, 2008
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