phrase commonly used to say that something is leaking profusely when it is not supposed to leak at all. A sieve is a wire mesh or perforated metal utensil used for straining or sifting. Therefore anything that is leaking like a sieve is not holding water at all.
I have tons of water damage from the rain. My roof leaks like a sieve.
by Joe Sausage July 1, 2005
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This generally refers to something not being able to retain fluid. A sieve is a piece of wire mesh, used to strain larger objects from fluid. Similar to a colander or strainer.
My nose leaks like a sieve, because I am sick.
by whoaubuh111 December 9, 2010
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