ZingW

TMZ/Getty

Gucci Mane had a few things to get off his chest on his new Lil Baby collab "Bluffin" ... an ode to cleaning up his act in and out of the rap game.

Midway on the track, Gucci took a shot at Wack 100's Clubhouse legacy, rapping ... "I want my M's up to one, two, three, four, five one-hundred (Go)/I ain't arguin' on no internet, I'm not Wack100 (No)."

Wack eventually got wind of the lyrics and, although he and Gucci share plenty of mutual friends, vowed to return fire on a diss track of his own after the weekend is over.

Waiting for your permission to load the Instagram Media.

ncG1vNJzZmivp6x7tbnZZ5qopV9nfXN%2FjmltaGlmZLS2r8KiZKaZnpp6o7jUn52ipl2hxrO1wqxksJmToHpyfI9mm6Kro2LBs63CpGSloZxir6Ku2Gg%3D