Muchos Grassy-Ass 

A play-on-words of the Spanish phrase "Muchos Gracias".
Another way of saying "your ass is grass".

Person A: Joe is being a real dumbass. And I heard he boinked Alex's girlfriend.

Person B: Woa. That's gonna be Muchos Grassy-Ass.

Muchos Grassy-Ass by OhMyGawth July 11, 2009

mucho grassy ass 

English way of saying ( mucho gracias ) or thank you very much..

next week try using mexican jetpack !! Si, si senior, mucho gracias..
Hay mucho grassy ass yourself I just like to see you FLY!!!

mucho grassy ass by itichie_nocanpo October 2, 2006