Definition of pettibockers in US English:

pettibockers

noun

US
historical
  • An ankle-length, loose-fitting pair of pants worn by women and girls as underwear.

Origin

Early 20th century; earliest use found in The New York Times. From petti- + -bockers.

Pronunciation

pettibockers

/ˈpɛtɪˌbɒkəz/