The act of pouring cheap tequila on your nuts and lighting them ablaze whilst tea-bagging your date. Very pleasurable for all those involved.
Nick: Dude, this weekend I totally performed Mexican Fireballs on some chick. We had to go to the E.R. after.
Aaron: You sick fuck.......
by BigBossHog69 October 03, 2010
When a girl dips a q-tip in rubbing acohole and shoves it down a guys peehole.
ya man she gave me the mexican fireball
by emmanuel blackburn October 09, 2006

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