Green’s Dictionary of Slang

vag n.2

also vadge

1. the vagina.

[Aus]Pussy Rag (RMC Duntroon ‘underground’ mag.) in Moore (1993) n.p.: I feel it my duty to let you know what a real [...] junket pumper, kunt head [...] tagman, uterus, vag-face, wanker, xgote, yiddish zero you really are!
[UK]Roger’s Profanisaurus in Viz 87 Dec. n.p.: vadge n. Vagina; fish mitten. Also US vag.
[UK]N. Griffiths Grits 463: It’s the wair ‘vadge’ I hate. ‘Vadge’ . . . it just sounds all kind of fat an splayed an stuff. It’s horrible.
[US] ‘The Cooter Monologues’ at www.pinkhairedgirl.com 20 Jan. 🌐 Vag. I don’t use this, but I knew a girl who did, and I thought it sounded cool, like her vagina was a really close friend or something.
[US]M. Lacher On the Bro’d 119: ‘[E]verything will come together and you won’t have to settle for just one vag’.
Twitter 24 June 🌐 Whereas the female [tawny owl] has the distinctive ‘twit’ call and a vag.
[Ire]L. McInerney Blood Miracles : ‘[T]he vag of some poor bitch who doesn’t really know you’.

2. thus, a general term of abuse.

OnLine Dict. of Playground Sl. 🌐 vadge n. [...] An excessively stupid or unpleasant person.

In phrases

get/have one’s vag in a knot (v.)

(US) irrespective of gender, to be emotionally overwrought, ‘in a state’.

[US]M. Lacher On the Bro’d 273: While you’re busy with your vag all in a knot about pissing, I’ve been just chilling.