A Dogcunt is a person that has betrayed either a member of his/her friendship group or the group as a whole.The act can be malicious eg; sleeping with a friend's parner, or non-malicious such as leaving a friend to face a beating in order to save one's own skin.

Friend one: I heard thomo fucked your mrs?Friend two: Yep... Fucking dogcunt Friend one: So paul just left you to cop a beating from 3 guys?Friend two: Yep. If he had've stayed we could have taken them, but I couldn't take three by myself.Friend one: What a fucking dogcunt.