maniacal

Suggestive of or afflicted with extreme mental derangement.

Characterized by excessive enthusiasm or excitement.

Wildly irresponsible.

Pertaining to madness; marked by or manifesting mania; insane; mad: as, a maniacal tendency; maniacal ravings.

Affected with, or characterized by, madness; maniac.

Like a maniac; insane; frenzied.

wildly disordered