Floyd Mayweather -- I'd Kick Triple G's ASS ... He's Delusional

Floyd Mayweather is talkin' A LOT of smack about a guy he thinks isn't worthy of a fight -- spitting even more venom at Gennady Golovkin ... after Triple G said he'd beat Money's ass in the ring.

GGG fired the first shots earlier this week ... coming on "TMZ Hollywood Sports" and telling the crew he's 100% sure he'd KNOCK FLOYD OUT if the two pugilists ever shared the squared circle.

Now, Floyd is personally responding to the smack talk ... telling FightHype.com that Gennady is OUT OF HIS MIND if he thinks he can hang with the champ.

Floyd acknowledges that GGG has knocked out his last 20 opponents ... but says all of those guys were NOBODIES ... and claims he's still wayyyyy out of Mayweather's league.