Originally used in certain areas of the UK as an expression to describe how "The truth hurts". Has evolved into every day use as a term used to describe one's pain and severe social suffering.
Ian (to Dave) - "You gonna start filling those footings or what kid?"
Wayne - "Nah his heads too fogged up from last night, ain't it!"
Dave = Wounded
Ryan - "So when shall I pick up my tickets for Bath and West?
Ben - "Uh... we didn't get you one mate"
Ryan = Wounded