under your belt

under your belt

COMMON If you have something under your belt, you have already achieved it. He'll need a few more games under his belt before he's ready for international football. Today, with the Nobel Peace Prize under her belt, she is a stateswoman of world renown.
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under your belt

1 (of food or drink) consumed. 2 safely or satisfactorily achieved, experienced, or acquired.
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under your ˈbelt

already achieved and so making you feel more confident: With ten years’ experience under his belt, Mark was ready to start his own business.
See also: belt