banana skin
n.— «Italy are a good side—they won two games in the Six Nations and pushed Ireland in the warm-ups and most of them have beaten Scotland before. This, therefore, is not a “banana skin”; it’s what the French call a seizième-final, the round before the last eight, rather like the match we won against Fiji, 22-20, in Sydney in 2003.» —“Sportblog: Five things the Scots must get right” by Gregor Townsend Guardian Unlimited (United Kingdom) Sept. 29, 2007. (source: Double-Tongued Dictionary)
Further reading
A Francophone who’s feeling low might say so with J’ai le moral dans les chaussettes. The idiom avoir le moral dans les chaussettes means “to have morale in your socks.” This is part of a complete episode.
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