(idiomatic) Used as an ironic acknowledgement of someone's arrival, especially to imply that they are unwelcome or disagreeable in some way.

(idiomatic) To act in one's own interests; to act in a manner advantageous primarily to oneself.

(idiomatic, usually followed by at) To regard as inferior or distasteful; to hold in contempt.

Alternative form of a cat may look at a king

Alternative form of look out for number one

Indicates that the speaker is looking for a grocery store.

Not as naive or foolish as might be expected.

(rhetorical question) Used if the interlocutor seems to believe something inaccurate about (someone); this question serves to free someone of a misconception.

(informal, seduction community) A look of rapt attention, expectation, or excitement, seen as a sign of romantic interest or pleading.

Used other than figuratively or idiomatically: see look, over, shoulder. / (idiomatic) To check obsessively out of excessive caution or fear of a perceived danger.