a Northern England expression intended to rudely dismiss someone or rudely tell them to leave, go away, akin to * scram, get lost! "
So, after I boinked her, we were done but she wouldn't just leave, so I says to the tart " okay, now, well, slag-off!" and then she left in a huff.
by Billiemski LeWiglud June 21, 2020
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more or less being insulting or dorogatory in a sexual way..

"she is a slut"
"Oh Bob you fucked her last night stop slagging off"
"she is a slut"
"Oh Bob you fucked her last night stop slagging off"
by Nikki Gloom February 23, 2014
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Slag off is go from here
Bart to millhouse: slag off i said slag off
by Shemesh November 28, 2019
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