Alternative spelling of C-sharp

An object-oriented programming language named C#.

As sharp as a razor; extremely sharp. / (idiomatic) Very clever or quick-witted.

Having acute vision; having good eyesight. / Attentive, given to noticing things, aware.

Clever, keen of intellect, swift of thought.

Having an acrid or bitter wit. Often said of someone skilled at or given to insulting or belittling others.

Very sharp; as sharp as a needle / (of a sound) very high-pitched.

(dated, idiomatic) eager in appetite or desire of gratification; ravenous

mixed connective tissue disease

(chiefly imperative) Pay attention; be alert. / (chiefly imperative) Hurry up; work quickly.