Tyson Fury tells TMZ Sports nobody likes Anthony Joshua anymore ... and it's all because "he got knocked out by a fat guy!"
The Gypsy King hilariously clowned AJ to our camera guy out in NYC on Tuesday ... saying after Joshua took that infamous L to Andy Ruiz in June -- he lost ALL of his clout.
"Everyone's like, 'This guy who's ripped got knocked out by this little fat guy,'" Fury says. "And now, nobody likes him anymore."
The clip is laugh out loud funny, Tyson is seriously a character .