Green’s Dictionary of Slang

(W.I.) an effeminate man, a homosexual man who plays the ‘female’ role in sex.

1913		H. De Lisser Jane’s Career (1971) 47: ‘Y’u notice dat mampala man?’ she asked the girl.
1943		C. Thompson These My People 19: You can’t care woman, yuh is a good-fi-nothin’ mampala man.
1991		R. Antoni Divina Trace 49: We all knew fa years that this Chief of Police was a mammapoule.