fart in a mitten
n.— «Such terms would, understandably, have the Broadcasting Standards people “jumping about like a fart in a mitten,” in the phrase that [Reinhold] Aman cited in 1984.» —“Lingua Franca: One Hell Of An Insult…“ by David Rowan Guardian (London, England) June 5, 1993. (source: Double-Tongued Dictionary)
Further reading
Is it just desserts or just deserts? Gina from Harvest, Alabama, says that when using this phrase, she’d always pictured dessert, as in “the treat someone deserves,” but the correct term is indeed just deserts. This particular desert isn’t an arid...
After Diana from Williamsburg, Virginia, scraped the front of her leg on a chair, she fretted to her grown daughters she had barked her shin. Neither daughter had ever heard the expression. This kind of bark refers not to what a dog does, but to...