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The term involves hitting a person/persons named josh with an avacado. The avacado then explodes turning said avacado into guacamole. Thus producing a guacadossy.
Hey look at that guy named josh over there, lets smack him with an avocado. Call that a guacadossy.

Hey guy named josh you like avacados cuh?
Guy named josh: yea cuh
You a guacadossy cuh.
by JAK3ZILLA May 11, 2018
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