It’s related to street beef
(confrontations). Meaning, that’s it for this situation, this is as far as this shit goes. You can not reverse what has already happened no matter how hard you try. It’s me or you!
Also means something is or was Lit af.
“This shit on the floor, wrap n**** body in a sheet, turn him to a ghost!”
“Brodie thought it was over, nah, this shit on the floor!”
“That block party was on the flo!(floor)”