(idiomatic, US) As an interrogatory, indicative of a nonchalant attitude towards potential criticism, not caring about what other people think, confident and self-possessed.

Used to introduce one's opinion, without being asked for it.

(UK, idiomatic, humorous) Expresses disbelief.

(dated) an exclamation of surprise

Only me; myself alone.

The official nickname for the state of Missouri in the United States of America.

Alternative form of shoot me

(idiomatic) A cry of surprise

Exclamation of long-suffering dismay or disgust.

Alternative form of Show Me State