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Effeminate

With contributions by GingerMango. - Thanks!

Having feminine qualities.  Typically used to describe the behavior of some genetic males who are or may be perceived by some as homosexual or bisexual, while rarely if ever applied to describe genetic females.  This term is not specifically understood to carry negative connotations.  C.f., for instance, "queeny" or "flaming", both of which are usually applied to connote extremely effeminate behavior in a negative or disapproving way.