Ardently desires to hug American gents in underpants

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
type of warm underwear, 1943, originally for U.S. GIs. By 1919 as a type of pastry. Long john also was used of various sorts of worm, potato, sled, etc.

WordNet Word definitions in WordNet
n. warm underwear with long legs

Wiktionary Word definitions in Wiktionary
alt. 1 (context US English) Full-length undergarments worn to keep wearer warm in cold weather. 2 (context US English) A full-length undergarment worn on the bottom half of the body to keep wearer warm in cold weather. n. 1 (context US English) Full-length ...

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun EXAMPLES FROM CORPUS ▪ Also men's long johns and women's sports tights. ▪ At the beginning of the winter I always feel a bit reluctant about working outside until I get my long johns on. ▪ Design: round neck, long sleeve top and long johns , women's ...