毫无保留地吐露心声或充分表达意见to talk openly and frankly about one's feelings and opinions

• 他一遇到困难就喜欢找几个朋友吐槽。

  As soon as he meets a difficulty he likes to chew it over with friends.

• 两人在节目上却毫不嘴软地吐槽对方。

  They both poured their hearts out to each other in the show.