Someone or something that greases (applies grease).

(slang) A mechanic.

(slang) A biker, a tough.

(slang) A rocker or metalhead, especially one who listens to 1950s rock and roll or 1980s thrash metal.

(US, offensive, ethnic slur) A Latin American, especially a Mexican.

(US, offensive, ethnic slur) An Italian.

(US, offensive, ethnic slur) A Greek.