母胎 mǔtāi mother's womb Origin Definitions Defs Strokes Stroke Words Sentences Sents 母胎solo mǔtāisolo single since birth (slang) never been in a romantic relationship since the time of birth; always been single母胎单身 mǔtāidānshēn single since birth Refers to someone who has never been in a romantic relationship throughout their entire life.