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8.
when a mexican cleaning lady does a good job, and american says thats MEXELLENT!
the proper response to this comment would be AYYY

the cleaning lady did one hell of a job, so i said IT'S MEXCELLENT! and she said ayyy.
by lowra June 22, 2006
 
9.
In reference to marijuana that contains lots of seeds, stems, a low THC level, and often from Mexico. It can also refer to low grade marijuana in general.

Yo man, I only got $20 but I don't wanna get chronic. Know anyone one that can hook up the mexcellent?
by CTM_dick October 26, 2005