Alternative form of I don't know

(informal) Used to say that something is too strange, embarrassing, or complicated to explain.

(idiomatic) Used as a mockery to someone who is about to be or should be confined in prison.

Don't release saliva when you're talking.

(Internet slang) Said to urge another not to respond to disruptive attention-seeking behavior, particularly in online contexts, by pointing out any such response is likely to be counterproductive.

Indicates that the speaker has no interest or emotional investment in the topic at hand.

To say that somebody is not to do anything without receiving further instructions. / To say that somebody is obliged to do something without question.

really?; no kidding!; is that so? (sometimes used sarcastically in response to the obvious)

used after a statement to indicate an emphatic or ironic negative

A phrase used in response to a question or command in which the target person does not know the answer to or how to respond.