1 adj If you describe someone as manic, you mean that they do things extremely quickly or energetically, often because they are very excited or anxious about something.
He was really manic..., He seemed to have an almost manic energy.
manically adv usu ADV with v, also ADV adj
We cleaned the house manically over the weekend...
2 adj If you describe someone's smile, laughter, or sense of humour as manic, you mean that it seems excessive or strange, as if they were insane.
...a manic grin.
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