Green’s Dictionary of Slang

1. (Irish) the vagina.

1888-94

‘Walter’ My Secret Life VIII 1648: ‘Ahaa—suer me chunt’s as hot as hell—fuck—fuck hard—piss out your boiling spunk into my bloody chunt—sure that will cool my chunt’.

2. (US campus) an unpleasant, incompetent person.

2004

Eble Campus Sl. Apr. 2: chunt – someone who is incompetent and obnoxious. Possibly from chump + cunt.