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longies

American  
[lawng-eez, long-] / ˈlɔŋ iz, ˈlɒŋ- /

noun

(used with a plural verb)
  1. long underwear, especially for winter use.

  2. long pants for boys.


Etymology

Origin of longies

An Americanism dating back to 1950–55; long 1 + -ie + -s 3