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Adj. 1. cissy - having unsuitable feminine qualities
effeminate, emasculate, sissified, sissy, sissyish, epicene
unmanful, unmanlike, unmanly - not possessing qualities befitting a man
I know what it means, I just want to see the source for your assertion that "cissy derives from Narcissist."
Not that I don't believe you; I just never heard it before. I only know of the "sister" derivation.