Undercrackers
Undercrackers is a slang expression for underpants or knickers.
The origin of this phrase is unclear, one can only speculate that it comes from the loud cracking sound made by the elastic band in some undies when released accidentally while one attempts to remove them from a loved ones backside.
Example usage:
“Don’t get your undercrackers in a twist, it’s only a game!”.
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