-Someone who isn't afraid to throw down on the weekends or any day for that matter.

-Most commonly found to have a twin.

-Smokes "only in certain moods"
-Never caught in a picture not smiling.

-Consistently deny that they are in fact Cool AF
Did you know that girl from class is cool AF?
by ThatFunnyKidFromNutrition March 1, 2017
Abreviation for: Cool as fuck
Justin Bieber is cool af
by nitchell March 4, 2016