The phrase 'slag off' is used in many ways, meaning somebody has been talking about you badly to another person
by Lovelykitten007 November 10, 2015
by Kung-Fu Jesus April 30, 2004
by Al April 10, 2005
by Revolutionary July 05, 2003
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 March 01, 2014
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by gav November 14, 2003