Short for ‘as fuck’ used with an adjective to demonstrate something or someone as being the maximum level of that description.
by Jo4Bean July 27, 2018
The acronym stands for 'as fuck.'
That dinner was good AF.

Translation: That dinner was good as fuck.
by Mr McDownage October 10, 2011
1. (common) Stands for "as fuck".
2. (photographic) Short for autofocus. Sometimes combined with other letters, e.g. when talking about camera-side, AF-S is single autofocus (only done the moment you tell it to) and AF-C is continuous autofocus (done constantly between turning it on and off).
1. Dude, calm down, you got no chill and are angry AF!
2. What are you doing, shooting wildlife shots without an AF lens? Unless the animals are tranquilized, but then there's nothing interesting in that.
by Egg F1337 February 18, 2016
"As foretold." To such a degree it was foreseen in prophesy.
MACHIAVELLI: damn, check her out
NOSTRADAMUS: she thick af
by Himumu December 14, 2016
"Hey bae what u doing"
"Nun. im tired af"
by QveenSapphire October 8, 2015
Typically used as an adverbial or adjectival acronym meaning, "as fuck", AF refers to a higher, more significant version of the verb. When you are "extra" tired, you are tired AF. Might also work with nouns, although grammatically might be disjointed.
by The Review Dude February 25, 2017
The acronym stands for 'as fuck.'
I am Muke af

Translation: I am Muke as fuck
by Huke_Lemmings November 8, 2015