Definitions
1.adjectiveHaving a slippery surface; having a surface covered with grease."a greasy mineral"
2.adjectiveContaining a lot of grease or fat.
3.adjectiveShady, sketchy, dodgy, detestable, unethical.
4.adjectiveFat, bulky
5.adjectiveGross; indelicate; indecent
6.adjective(of a horse) Afflicted with the disease called grease.