I think you mean "Aye ahm ur" literally "Yes I am".

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Makes perfect sense to me. Don't know why anyone would spell it wur.
Edit: That's wrong above. Literally it's "Yes I'm Are" but it means "Yes I Am" .
It makes sense now that you’ve explained it, but if a Cambridgeshire native had said it me I’d have been mogadored, now there’s an oldie, mogadored (confused), allegedly from Cockney rhyming slang for floored.
The Cambridgeshire vernacular reminds me of years ago when I’d make a regular delivery to a garage in Downham Market, Norfolk.
The guy who took the delivery was always in the bowels of the garage when I’d arrive, so I’d call out, “MICHAEL!”
He’d shout back, “I’m now coming Jean.”
I’m coming now makes more sense, but Michael used a Norfolk speech pattern.
"I don't want nothing"
So you do want something?
The wife will say that to annoy me as it's probably the only phrase which ****** me off.
Sounds like your wife is a bigamist, I’ll say, “I think that I’ll have a ham sandwich.”
My wife, (born in Camberwell, raised in Peckham), will say, “We ain’t got none.”
I’ll take my life in my hands and say, “Oh, so we do have some then.”
Cue eruption of the Peckham volcano.