From Longman Dictionary of Contemporary Englishundiesun‧dies /ˈʌndiːz/ noun [plural] informalDCC underwear
Examples from the Corpus
undies• There should also be some cover for buying basics like toothbrush and undies if your luggage is delayed.• Banana splits still solved acute hunger problems but gorgeous undies were forgotten for the first time.• Her undies and the sandalwood box were in the top drawer of the dressing-table.• Twenty minutes later she stood in front of the mirror wearing the fragile lace undies which were also the result of her impulse-buying.• Interviews with happy shoppers who just bought new undies?• Even though Marci gets to give him a cuddle from time to time and wash his favourite bright red undies.Origin undies (1900-2000) underclothes 