used to describe a young, extremely energetic and demented man. Usually will have consumed a sizeable amount of alcohol. Prone to removing clothes, giggling uncontrolably, waving hands in the air whilst shouting 'womp womp' or 'banter' etc.
In certain circumstance has been known to cause property damage and personal facial injuries.
A liability to all around him.
"Jokerman was insatiable last night, absolutely demented!"
"He's had a rake load of booze, I'd say we'll be seeing the Jokerman at some stage!!"
"Did you hear the Jokerman threw a rock through a prominent south Dublin apartment block's door?!! Demented!"