A type of cigarette substantially longer and thinner than normal cigarettes.

(Ireland, regional) A potato farl.

(East Africa, uncountable) AIDS, or the chronic wasting associated with its later stages.

(slang, uncountable) Cocaine.

(intransitive) To lose weight in order to achieve slimness.

(transitive) To make slimmer; to reduce in size.

An adjective "slim" describes someone or something that is slender, thin, attractive, designed to appear slim, long and narrow, or part of a reduced workforce for increased efficiency.

(of something abstract like a chance or margin) Very small, tiny.

(rural, Northern England, Scotland) Bad, of questionable quality; not strongly built, flimsy.

(South Africa, obsolete in UK) Sly, crafty.