Definition of Y-fronts in English:
plural nounBritish trademark
Men’s or boys' underpants with a branching seam at the front in the shape of an upside-down Y.
- They'll be donning capes and Y-fronts over their trousers.
- He's over in the kitchen area, wearing nothing but his hat and a baggy pair of Y-fronts.
- Every man and his brother buys their Y-fronts at this shop.
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