Short form of asshole raydar. A 6th sense about assholes where upon meeting someone, you can instantly know whether or not they are an asshole.
Similar to gaydar, but with assholes.
Closely related to Geo-Gobshite. This word originates from the anglised variations of the Irish Padraic or Patrick. It is in use in common parlance to refer to a rather angry young Irish male from the hills.