banana skin

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++baˈnana ˌskin noun [countable] British English  MISTAKEan embarrassing mistake made by someone in a public position, especially a politician or someone in a government “香蕉皮”，〔尤指政治人物或政府官员的〕出丑，洋相 SYN American English banana peel This government has an unhappy knack of slipping on banana skins. 这届政府真有本事，总能踩到香蕉皮让自己出丑。

Examples from the Corpus

banana skin• Carrie kicked off her shoes and peeled her leotard down like a banana skin.• A tug-o'-war ensued and suddenly the rope came - unzipping all those carefully placed runners like a thumb through a banana skin.• The enamel has peeled off the taps like so much banana skin, revealing dull, patchy brass.

baˈnana ˌskin nounChineseSyllable  

a by an Corpus mistake someone embarrassing made in

banana skin
baˈnana ˌskin noun [countable] British English
an embarrassing mistake made by someone in a public position, especially a politician or someone in a government
   SYN  banana peel American English:
    This government has an unhappy knack of slipping on banana skins.

banana skinBrE /bəˈnɑːnə skɪn/ 🔊NAmE /bəˈnænə skɪn/ 🔊 noun (BrE, informal) something that could cause difficulty or embarrassment, especially to sb in a public position 造成麻烦（或使人当众出丑）的事物