Enough talk ... boxing champ Gervonta "Tank" Davis says he's ready shut Adrien Broner's mouth with his fists.
Broner WENT OFF on the undefeated 22-year-old fighter earlier this week in an n-word laden, homophobic tirade ... and even blasted Floyd Mayweather for allowing Tank on The Money Team.
But Tank joined the guys on the "TMZ Sports" TV show (airs Tuesday night on FS1) and fired back -- saying Broner's hate stems from simple jealously.
"I came up so fast and I'm taking his spotlight," Davis said .