穿开裆裤

穿开裆裤:

Literally means:

wear open-seatpants

Actually means:

It refers to wearing open-seat pants during one's childhood. Figuratively it means very young age.

It is used to indicate somebody's immaturity and inexperience. It is usually used by the speaker to ridicule inexperienced and childish people and then to show his own (or other people's) experience and seniority.

幼儿时穿的裤裆开着、不缝合的裤子。比喻人年纪很小的时候。

指某人幼稚无知、缺少经验。多用来讽刺人没有经验、幼稚可笑,从而显示自己（或第三方）经验丰富、资格老。