Noun
tighty whities pl (plural only)
(originally US, colloquial, often derogatory) Men's or boys' white briefs.
tighty-whities pl (plural only)
(slang) Alternative form of tighty whities
tighty-whities
The last time I'd seen the Minotaur, he'd been wearing nothing but his tighty whities. I don't know why. Maybe he'd been shaken out of bed to chase me. Rick Riordan