When someone makes an awful joke or references something which no one understands, so the group of lads say "Gud 1 Jan" in order to show that it was incredibly dead banter.
"Why did the console peasant cross the road? To render the buildings on the other side."
"Gud 1 Jan"
"Gud 1 Jan"
by Triforcepsychic December 15, 2016
Get the Gud 1 Janmug.