A mexi screamer is when beaner parents take their miserably ill behaved child out into public and ignore them while they run around and screech like maniacs ruining any peace you might have. Not to be confused with a mexi slut who also screams but without her parents.
We went to walk the dogs at the park and they were so many mexi screamers running around we had to leave. Mexiscreamers kill your days in public.