First, we fight ... then we booze?!
That's the plan for UFC star Gilbert Burns -- who says he can't wait to beat the hell out of his old sparring partner Kamaru Usman on Feb 13th ... and then pound beers together afterward!
Gilbert has earned a shot at Kamaru's welterweight belt at UFC 258 -- and tells TMZ Sports he intends to go after Usman with everything he's go, despite their chummy past.
"If the fight goes a little close to how our sparring sessions used to be .