maniacal
ma|nia|cal /mən'aɪəkəl/
[ADJ]
If you describe someone's behaviour as maniacal, you mean that it is extreme, violent, or very determined, as if the person were insane.
He was almost maniacal in his pursuit of sporting records...
She is hunched forward over the wheel with a maniacal expression.
● maniacally [ADV] usu ADV with v, also ADV adj
He was last seen striding maniacally to the hotel reception.
[ADJ]
If you describe someone's behaviour as maniacal, you mean that it is extreme, violent, or very determined, as if the person were insane.
He was almost maniacal in his pursuit of sporting records...
She is hunched forward over the wheel with a maniacal expression.
● maniacally [ADV] usu ADV with v, also ADV adj
He was last seen striding maniacally to the hotel reception.