(anatomy) Involuntary muscle which is found within the intestines, throat, uterus, and blood vessel walls.

A nonvenomous snake, Coronella austriaca, native to Eurasia.

A person who accomplishes tasks with efficiency and grace, especially one with verbal skills who is persuasive in interpersonal relationships, negotiation, etc.

(idiomatic, uncountable) Used to describe an activity that is not encountering any problems.

plural of smooth operator

(poker) To call a raise, as opposed to folding or reraising, often to disguise the strength of one's hand.

plural of smooth snake

Extremely smooth (in any sense).

Extremely smooth (in any sense).

(transitive) To make smooth. / (intransitive) To become smooth. / (transitive, figuratively) To remove irregularities or imperfections from.