Madge, n. — Green’s Dictionary of Slang

Madge n.

[joc. use of female proper name]

(camp gay) a tasteless person.

1972		B. Rodgers Queens’ Vernacular 130: Madge (camp) gay nickname and vocative indicating an ill-dressed, dowdy homosexual.
1980		Maledicta IV:2 (Winter) 227: Madge mocks a tasteless person.