1. When you are so high normal words cannot describe.
2. Other word for awesome, hot, cool
lit af: lit as fuck
"Ay bruh i was lit af , after we smoked wax on a blunt"

"She lit af bruh, check her insta"

Nathan: Dude that dude on the other team is lit af
Luis: No joke dude is 69-4-20
by CirusTheVirus January 14, 2018
ayy bruhh i was lit af : after we smoked wax on a blunt.
by youngk420 December 16, 2013
When something is really fuckin good.
A: Damn, this music is really good.
B: Yeah, shit is lit af. Turn that up.
by isi3456789 December 5, 2016
An expression commonly found of social media, used to express one's awe and affection towards a certain subject. The wording of the phrase can vary, and is often followed by several different emojis (😂,💯,🔥,👌🏼).

Can either be used unironically, which often makes the OP appear to be an obnoxious fag who should go back to 2016, or could be used ironically to express one's disappointment or lack of interest in the subject.
HAHA #TRUUUUU THAT SHIT IS 100% FULLY LIT AF FAM 💯🔥😂👌🏼😂🔥😂💯🔥👌🏼😂🔥💯😂🔥
used to describe a party
it's lit af boyyyyyyyyyy
by jqwijdoada October 20, 2017