Green’s Dictionary of Slang

(US gay) a feminine or passive lesbian.

1957		J.M. Reinhardt Sex Perversions 48: Marge – noun. The very feminine passive dyke. Adjective – feminine.
1972		B. Rodgers Queens’ Vernacular.
1982		Maledicta VI:1+2 (Summer/Winter) 133: Here are some obsolete or nearly obsolete terms which careless lexicographers continue to list as current […] Leslie Anne and Thespian and Marge.