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1.
A dirty, smelly Canadian.
hey look at that tall homeless grass back bathing in the trashcan
by john mclain March 05, 2008

Words related to grass back

canadian dirty hobo smelly ugly
 
2.
A racist colloquialism originating in the north west of England, referring to a person of darker skin tone. It is thought to have originated from the whip marks on slaves' backs, which, from a distance, look like long blades of grass stuck to the back.
Look over there, it's a grassback.
by The Big Baby April 27, 2012