It's a British word for someone or something that's ugly, dirty or unpleasant. Generally it was used to be derogatory about women - ie. "she's minging mate". I believe it originally came from the Scots, where the word 'ming' comes from the old Scottish English word for 'bad smell' or 'human excrement'. It was in wide spread use in the South of the UK while I was growing up.

See here for background: https://www.bbc.co.uk/worldservice/learningenglish/language/...

I always heard minging as "eating pussy". I am not british nor lived there but I think I learnt that decades ago watching French and Saunders TV show from the BBC.

Minger / minging are common UK slang

It's a very versatile word; minge, minger, minging, all meaning something different. (in order: vagina, ugly person, gross/disgusting, like Calypso Paradise Punch)