long johns
nounEtymology Reputedly named after American heavyweight boxer John L. Sullivan (1858–1918); also posed as an approximation of French longues jambes (“long legs”); see Wikipedia.
1
US A full-length undergarment, worn on the bottom half of the body, or two-piece, to keep the wearer warm in cold weather.
- Synonyms
- long underwear, thermal underwear, union suit