Next time, stick your fingers in his eye, throw him to the ground, rain some pain...proceed to bite his ear or his nose, drag him by his hair or balls, or the hair of his balls, to a wall and ram his head into it, and soccer kick him in the face a few times for measure.
Then tell him his daughter swallows, spit on him, and tell him THAT's fighting dirty/streetfighting.
Then use his daughter's D cups for speedbags.
KEEP IT GANGSTA, and KEEP THAT PIMP HAND STRONG.
wu-tang!
(I'm joking...call him, invite him out for dinner (pick up the check) and apologise, stating that the rules for your respective arts are different, and if he wanted a chance to even up, to set the boundaries of what you can and cannot do first.)