![5boys alternate_hairstyle anniversary bad_id bad_twitter_id black_footwear black_legwear black_neckwear black_sailor_collar black_shorts blue_hair blue_shorts brown_eyes brown_hair closed_eyes dated dress elbow_gloves eyebrows_visible_through_hair fubuki_(kantai_collection) genderswap genderswap_(ftm) gloves green_eyes hair_between_eyes hair_bobbles hair_ornament inazuma_(kantai_collection) kantai_collection kneehighs male_focus multiple_boys multiple_girls murakumo_(kantai_collection) neckerchief nigo open_mouth otoko_no_ko pants pink_eyes pink_hair red_neckwear remodel_(kantai_collection) sailor_collar samidare_(kantai_collection) sazanami_(kantai_collection) school_uniform serafuku shoes short_hair short_sleeves shorts signature silver_hair sleeveless sleeveless_dress smile thighhighs white_gloves white_pants white_shorts yellow_eyes rating:s score:7 post #3884443](/cdn_image/preview/0f/4e/0f4efde7e5889442109c0f179b413412.jpg)
男の娘 (otoko no ko) is a Japanese slang term used to refer to persons of male biological sex who have taken on the appearance and/or identity of the female gender. The term is a pun on 男の子 (otoko no ko), meaning "boy", replacing 子 with the ko reading of 娘 (commonly musume, girl).
Some communities have mistakenly taken to using the term as a word for feminine boys no matter if they convincingly wear girl's clothing or not. If you can correctly tell the gender with complete certainty from the thumbnail alone without looking at the genitalia, it's not this.
English-speaking fandom has traditionally used the word "trap" for this concept. Due to the negative implications of the term and its history (which 男の娘 largely does not share) as well as the term's ambiguity in English, its use is inappropriate for tagging purposes and it has been aliased.
On Pixiv the tag 男体化 is sometimes used for genderswap or otoko no ko art, but its meaning- "male's body", has multiple definitions. It can be a crossdresser who has a more masculine body (but isn't obviously a man), a woman who is very muscular, or it is sometimes used in place of otoko no ko (i.e. "he may have hips, but that's a boy's body").
The following tags are aliased to this tag: femboy and trap (learn more).