(adj.) Used to describe a person, especially a male, who seems to embody many female characteristics and mannerisms. Is not necessarily derrogative, just descriptive.
Q: Are you going to ask him out?
A: I don't know, he's kind of femmy, do you think he likes girls?
An insult or derogatory word towards a male who acts and sounds like he has a lot of oestrogen in his voice his pronunciations are very feminine and has mainly woke or female friends and very sensitive.
Your such a femmy. Stop being such a femmy. Of course you soundlike that femmy.
A boy that purposely dresses in a girly fashion. Most commanly seen today in the tight-pants-wearing "skater" population. They sport smooth chin length haircuts with long bangs that hang down across their eyes. A true femmy boy has androgynous facial features and will spend numerous hours plucking his eyebrows.