Having such a high level of intoxication a person loses track of what they're doing.
I didn't even drink my tequila shot. I dumped it in my drink and left my drink on the bar. Too lit.
When something/someone is "awesome" or something fun.
Man, that party yesterday was "lit" yesterday
Just pure awesomeness in describing something or someone
"ITS LIT DUDE!!!"
"I KNOW RIGHT?!?!!!"