greaser

UK: /ˈɡriːsə/ US: (grē′sər)

WordReference Random House Unabridged Dictionary of American English © 2025

greas•er  (grē′sər), n. 

1. a person or thing that greases.
2. Slang Terms (disparaging and offensive). a Latin American, esp. a Mexican.
3. Slang Terms a swaggering young tough, esp. a member of a street gang.

• grease + -er¹ 1635–45

Collins Concise English Dictionary © HarperCollins Publishers::

greaser / ˈɡriːzə ˈɡriːsə/ noun

1. a mechanic, esp of motor vehicles
2. a semiskilled engine attendant aboard a merchant ship
3. a young long-haired motorcyclist, usually one of a gang
4. an unpleasant person, esp one who ingratiates himself or herself with superiors