Nunchuckin' Playboy Model -- Wins Taekwondo Tournament ... Boobs Of Fury

Playboy model Nasia Jansen just proved that she's more than just a nice pair of nunchucks ... 'cause TMZ Sports has video of the buxom brawler kicking ass at a SoCal Tae Kwon Do event.

Nasia, who's been into martial arts for years and displayed her SIZABLE talents on YouTube ... took 1st place in her weight class at the Palmdale Mayor's Cup tourney last month.

Check out the vid -- Nasia ain't messing around, and looks totally legit in there landing a nice kick to some poor woman's body.

Speaking of bodies, check out Jansen's below as she wields her weapons ... and a pair of nunchucks.