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A word popularized by the Facebook group Dad Nation.

Find a mirror and spell it backwards
You’re a Gaf. “
“Yeah. The biggest gaf you know. “
by Smithd33 March 15, 2019
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2
an irish way and hip way of saying house

"lets all go to my gaf"
"gaf party!!"
"free gaf"
"your gaf is huge!"
by sopureirish August 10, 2008
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3
v. to "give a fuck"
the opposite of dgaf, which means "dont give a fuck"
stated at times when someone really cares about something
"your way late my friend."
"DGAF hard"
"Well i GAF bitch."
by tsanch September 21, 2008
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5
"Gay as fuck" - A slang abbreviation to describe someone who is extremely homosexual in their appearance, or in what they say.
Girl 1: Does John seem a bit camp to you?
Girl 2: Yeah, he's gaf...
by golligysutton July 11, 2013
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6
It stands for 'Give A Fuck'.

Used as a way of saying 'I Don't Give A Fuck' (Usually put as DGAF in virtual conversation).
'I got an A in the test today!' 'GAF'
'Are you coming to watch Harry Potter later' 'GAF about Harry Potter'
by JustHereToWriteAboutThis December 13, 2011
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7
Fag spelt backwords. Used as an insult directed at hetrosexuals & Losers.
Shut the Hell up Gaf!
What the Gaf...
Fucken Hell we're surrounded by a bunch of Gafs.
I hate Gafs.
RAWR DEATH TO GAFS!
by Matik777 November 02, 2006
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