(stark) raving mad
Totally crazy or eccentric; filled with an excessive amount of emotion, especially anger or excitement. I know you'll probably think I'm raving mad, but I sold all my possessions and am moving to a small village in China. The announcement drove fans stark raving mad, as it will be the first new album the band has released in over 10 years. The boss is stark raving bonkers after I bungled the expense reports.