Top Definition
To verbally attack, using disparaging terms.

by Kung-Fu Jesus April 30, 2004
argue, call names
This kid was slaging me off so i decked the cunt
by gav November 14, 2003
The phrase 'slag off' is used in many ways, meaning somebody has been talking about you badly to another person
Jenny was slagging you off yesterday, she said you were ugly. She slag off me all the time
by Lovelykitten007 November 10, 2015
Another term for "shut the fuck up" or "shut your fuckung mouth".
Jack was boulshitting all the day, so I asked him to slag off.
by Al April 10, 2005

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