Greasy (adjective)

1. Covered in or containing a lot of oil or fat.
2. Having an oily or unhealthy appearance.

Origin:

Middle english (in the sense "covered in grease"): from old french gras, from latin crassus "thick". greasy refers to something that is covered in or contains a lot of oil or fat.

Examples:

1. The fries were greasy.
2. The hair was greasy from not being washed.
3. The kitchen was greasy from cooking.
4. The shirt was greasy from being worn for too long without washing.
5. The hands were greasy from handling food.