Feminine to me is a very sing songy way of talking, every word has an extra syllable. Popping lips, delicate mannerisms, deliberate soft/nasal voice and all of this is done very subtley actually. When I say popping lips I dont mean acting ghetto I mean naturally doing it here and there. Then there are the extra things guys do that are clearly feminine like wearing clohing that is designed for women, extra cosmetics, etc etc. Its more the combination of all these things generally.
Masculine is an overall thing, too. But I wont say MUSCLES! DEEP VOICE! FITTED CAP....its honestly a matter of being NOT feminine. Its just.... regular. A regular guy. You can have feminine 'ways' and still be masc to me. Just not that combination mess I described above. and if course It varies from person to person