Green’s Dictionary of Slang

greaseball n.

[-ball sfx]

1. [1910s+] (orig. US milit., also greaseball grunt) a short-order cook; a kitchen worker.

2. [1910s+] (US) any filthy or offensive person; thus the lowest category of tramp.

3. attrib. use of sense 2.

4. [1920s+] (orig. US) a derog. term for a person of any Latin race, e.g. Italian, Greek, Puerto Rican, various South Americans etc.

5. [1930s] (US) an automobile factory worker; a garage mechanic; also attrib.

6. [1950s+] a derog. term of address to a Latin person.

7. a sycophant.