A fast-food sandwich created by smashing a chicken sandwich in the middle of a double cheeseburger, both of which are on the dollar or value menu at many fast food burger establishments. This results in a $2 mega-sandwich which is quite filling. Sometimes referred to as a McChubble.
Ryan: What didja order?
William: Bro I got me a McChubbins for $2 and it's the shit!
Ryan: I didn't see no McChubbins on the menu!
William: You gotta know the secret... watch and learn