Head the ball

n.

Heard in Kilkenny, Kerry, Offaly, Antrim and Dublin

A mentally unstable person. Also: A crazy person. Also: A nutter.

In use

I dumped me girlfriend, 'cos she tried to chop me mickey off last night. She's a fuckin' head-the-ball!" "Jay, dat fella is some head the ball" "He's a right head the ball

Posh English

I ended the relationship because she attempted to sever my male member last night. She is a complete nutter.

Same phrase, other counties

Dublin
Kerry (not in the dictionary)
Offaly (not in the dictionary)