Definitions

1. verb

to give evidence of one’s attitude or opinion, often by a trivial or affected action; to behave in a particular way to show one’s attitude

“She attitudinized by wearing a beret to the party, trying to look more artistic.”

2. noun

an instance of showing one’s attitude or opinion, often in a trivial or affected way

“Her attitudinizing at the party was annoying to everyone else.”