(Interjection) The way that an ignorant dumbass says gracias.
You went and bought a case of cold brewskies just for me? Grassiass, man!
by McCrapper July 16, 2012
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When you are doing anal in the front yard and she or he says thank you
Jessica: Thanks for the Grassiass
John: No Problem
by Pooppppppyyyyyy March 26, 2021
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When you are having anal sex in the front yard and she says thanks for the good time.
Jessica: Thanks for the Grassiass
John: No problem
by Pooppppppyyyyyy March 26, 2021
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