Please don't just post your favorite, maybe post what it means or why you like it, or if it is popular or how it is a good idiom or whatever, just DO NOT SPAM
make a mountain out of a mole hill. Lol, i use stuff like that, though not as like, poetic. Btw, an idiom is sorta like a saying that poses no relation to what you actually mean. Like, piece of cake means somethings easy, but the situation has nothing to do with cake.
My all time favorite. "Water off a Duck's Back." When I first heard it, I went," Water off a Duck's Back... I thought water was absorbed in their skin. It means being giving negative comments but shooing them away.