A person of Latin decent shrouded head to toe in rags and carrying a weed-wacker or other lawn and/or garden care weapon. Often sighted neighborhoods driving trucks with some form of lawn service sign on them. Commonly used as a racial slur.
Those *amn grass ninja's need to learn english.
by Blindey August 23, 2007
Top Definition
A person shrouded head to toe in rags and carrying a weed-wacker or other weapon. Commonly sighted on U.S. military bases in Japan.
by Anonymous October 05, 2003
Person who does not ever buy weed, but always smokes others. Mooching off of smoking circles or other social groups.
"Was Roy at the party?"
"Yeah man, he was a Grass Ninja like always and smoked all our weed and left."
by ThatGuy85 March 29, 2016
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