underpants

Etymology

From under- + pants.

noun

1. underwear covering the genitalia and often buttocks, usually going no higher than the navel.
   The Italian fashion of wearing red underpants on December 31 is becoming popular, reputedly to guarantee luck for the new year. 1994, Marketing in Europe, Issues 380-385, page 77
   She takes off her fatigue pants and throws them in the washer and the surgical greens and her bloodstained bra and turns on the machine. She is wearing socks and underpants and a .38 Special with a shrouded hammer in an ankle holster. 1999, Thomas Harris, Hannibal, page 19
   He wore khakis slung so low that five inches of his underpants showed—dark blue boxers with big white polka dots. 2011, Les Roberts, The Cleveland Creep: A Milan Jacovich Mystery, page 87