(Canada, US) Said as a request to repeat information. / (Canada, US) Said, as though as a request to repeat information, in order to indicate disbelief or indignation.

An old-fashioned type of dance where partners are constantly changed.

Alternative form of it's all Greek to me

(idiomatic, slang, offensive) An expression of discontent or aggravation to another party. / (idiomatic, slang) A taunting phrase, essentially meaning "I don't care".

(chiefly humorous) A person who is a miniature, but otherwise identical, version of a particular person.

(idiomatic, dated, UK, Ireland) An expression of mild surprise.

(Australian Aboriginal) we, us

(idiomatic) Sorry; said as an apology. / (idiomatic) Polite expression used to soften a contradiction. / (idiomatic, Canada, US) Polite expression to ask someone to repeat an utterance.

(colloquial, idiomatic) Indicates the expression of a personal opinion, but often used ironically as an understatement.

(colloquial, rhetorical question) Am I the only one who thinks this?