Indifference, or I do not care, also whatever

An expression of apathy.

Meh is used to say whatever, I don't care, I don't have an answer, I have nothing else to say, I'm frustrated, not interested or your joke isn't funny.

Used when there is lack of other words to use in a situation.

yeah whatever. blah, i dont feel like answering you

An expression used to indicate indecision or disinterest, 'the sound of a shrug'.

verbal shrugging of the shoulders.