(adj.) Insane, particularly if characterised by exaggerated or cartoonish behaviour ; gibbering in an nonsensical fashion. (After RogerIrrelevant in Viz magazine.)
He stood in the corner shouting, "Wibble! Wibble! More beetroot, Archdeacon?" I'm afraid he's gone completely hatstand.
Possibly originating from a man who kept trying to put his wife on a hatstand because he thought she was a hat. Chronicles by Oliver Sacks in his book “The man who thought his wife was a hat”.
Hatstand means crazy.
A bath consisting of a variety of slats, oils, soaps or any other added ingredients such as fruits, milks, herbs or any other spices for health or beautifying benifits.
She brought home alot of stuff and took it to the bathroom. She must be taking a witch bath.