Butch is a worker at a factory where Stewie works in a cutaway gag in "The Boys in the Band".
When Stewie is determined to make something of himself, he tells his co-workers on lunch and is belittled for his plans, with the crew leader and others taking their laughs to Butch. When Stewie starts to storm off, Butch pulls him aside and lets him know he believes in him, only to have Stewie cut him down as a loser to the other workers.