A sip; a small amount of food or drink.

(informal) Superintendent.

(mathematics) Supremum, upper limit.

(bodybuilding, colloquial) Supplement.

(Cambridge University slang) A supervision.

To sip; to take a small amount of food or drink into the mouth, especially with a spoon.

To eat supper.

(physics) Being or relating to the squark that is the superpartner of an up quark.

(slang) what's up (either as a greeting or actual question)