Slagging is a term used to describe a kind of harsher form of teasing. While this may seem like an insult to some, to the Irish, it's considered a behavior that shows affection or bonding, and, in some cases, is even used as a compliment.
John:*falls down*
Patrick: Jesus, were you born with one leg shorter then the other?
John: Fuck off
Patrick: Calm down, Iâm only Slagging you
An Irish Tradition were two or more people engaging in a conversation reminiscent of a rap battle where the people involved insult eachother back and forth, it is not meant in a aggressive way but more of a joking way between friends it is not meant to be taken to heart
Person A: Your one dumb cunt
Person B: You are the shortest arsehole in the world
Person A: Well at least I actually sore girls
Person C: Yeah, and all of them are fucking ugly
Random person: Why are you guys fighting?
Person A: Its alright, weâre only Slagging each other