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Descriptive of a couple who are really in love and will never split up, not never, ever.

Typically the 'welder' is some 17 year old scallie bird who welds herself to some poor sod with shit for brains and a pimped-up Vauxhall Corsa that he street races up and down Smithdown Road.
"Eh, Marky. Bez an' Tray are fuckin' welded, son. She won't let the poor bastad out with his mates anymore."

"Oh yeah, me an' Bez are welded. We're gonna, get married an' have loads of babies."
by Lord Ass June 23, 2005
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