What might help is if we knew the context of the shirt was it being worn by a muscle bound jock, an obvious gen-con attendee, an attractive female?
Did it look professionally produced or was it obviously something someone had made themselves?
For some reason I'm thinking of So I Married an Axe Murderer where The scottish father tries to convince his son that Colonel Saunders is part of the Trilateral Commission. Maybe this guy was saying it was the Colonel, Ernie and the perserved stewed brain of Joseph Stalin. (Okay the last one is a stretch).