2) To drink mad beers and get completely sauced
To slay can be done seperately in either example one or two or a combination of both such as slaying mad beers and gettting completely shitfucked then continuing to slay some trolliping whore you meet during your drunken rage.
StevieG: Its probably from slaying beers all night
Yo i just met this girl at a party, we're heading back to my place to slay like unicorns.
At the whore house last Mike just slayed every girl in sight.
Riv Dog: Slay all dayyyyyy
Teacher: I know what that means.