Originally published on ProWrestlingSheet.

Tank Abbott -- former WCW wrestler and UFC legend -- is positive he'd beat the living crap out of Ronda Rousey in an MMA fight ... strictly because of her gender.

The 50 year-old fighter was discussing a potential fight between Ronda and Floyd Mayweather on his Proving Ground podcast ... and adamantly stated Rousey would lose because women are too emotional.

Abbott went on to say he'd beat any girl in an MMA fight, including Rousey, for the same reason -- which is why he's willing to offer 100K to any woman who can prove him wrong.

Tank even claims he'd be willing to make it a 2-on-1 contest.

The only caveat -- any girl who fails has to make Tank Abbott a sandwich as consolation.