If the dude is a meathead, work them leg kicks.
If the dude is less fit than you, you jab and fight like a bitch until he gets cut.
If the dude is taller, you take him down.
If he can wrestle, fight near a fence and grab that shit if he tries to take you down, being near any sort of wall helps.
Careful not to punch a forehead with your knuckles, you'll break your hand b.
Happy streetfightin, gimme a shoutout if you end up on WSHH.