no-no
n.(名词)【复数】 no-.noes 【非正式用语】 Something unacceptable or impermissible:不能接受的或者被禁止的东西:例句:.Even though his company wasn`t the one involved in the case, what he did is considered a definite no-no.(Mike Royko).即使他的公司没有卷入那件事当中,他所做的仍被认为是件绝对不能接受的事.(麦克·罗伊考)
A social blunder; a faux pas.失礼