op

(noun, verb, initialism)

initialism

1. Alternative letter-case form of OP (original post, original poster)

noun

1. Op art; a style of abstract art.

2. (informal, sometimes pluralized) Operation.

- My mother's going in for her knee op today.

3. (Internet) An operator on IRC.

verb

1. (transitive, Internet) To promote (an IRC user) to an operator.