greaser

n. person or thing which applies grease; person from South America (Derogatory Slang); flatterer (Slang); member of a gang or group (Slang)

Greaser can refer to:Greaser (derogatory), a derogatory term for a Mexican.Greaser (subculture), a subculture that developed in the United States in the 1950s.A device to apply grease (lubricant).Someone who uses vegetable oil as fuel. Someone who uses a derivative of a fat (such as biodiesel) as fuel. A variation of the Italian ethnic slur, Greaseball.
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Noun
1. offensive terms for a person of Mexican descent
(synonym) wetback, taco
(hypernym) Mexican
(classification) ethnic slur

(n.)
One who, or that which, greases; specifically, a person employed to lubricate the working parts of machinery, engines, carriages, etc.
  

(n.)
A nickname sometimes applied in contempt to a Mexican of the lowest type.
  

a young man with greasy hair, a hoodlum, a hood Two greasers were hanging out behind the school.