headbin

From head +‎ bin. Variant of headcase.

headbin (plural headbins)

1. (Ulster) An unstable or eccentric person.
   • 2004 September 9, Captain Coulston, “Re: Proof that Wahid Azal's new book is selling”, in talk.religion.bahai‎ (Usenet):

     it is strange that only you think i am doomhead. others around here know better. it just proves you're a headbin who's just rifting around here. ask birdy if you don't understand that. if you scunner her as much as you scunner me you'll not get an answer, just proves you're a skite the gutter which everybody but you already knows.

• Jonathon Green (2024) “headbin n.”, in Green’s Dictionary of Slang