Characters
Come on, what are you, a man or a munchkin?
— Lister • Red Dwarf
Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker taunts someone with a forced choice between being a proper man and a tiny, ineffectual munchkin. The 'Come on' pushes them to act, and the insult works by setting grown-up courage against comic smallness. It is a goading dare, meant to shame them into stepping up.
Context reviewed