hooter UK /ˈhuː.tə(ɹ)/US /ˈhu.tɚ/noun 9forms 1 noun9 •A person who hoots. •The horn in a motor vehicle. •(UK) A siren or steam whistle, especially one in a factory and used to indicate the beginning or the end of a working day or shift.Suddenly, far down and beyond the toun there came a screech as the morning grew, a screech like an hungered beast in pain. The hooters were blowing in the Segget Mills. — 1933 •[usually plural] (US, slang) A woman's breast. •(slang) A nose, especially a large one.Aye, it may be a joke to you, but it's his nose. He can't help having a hideous great hooter! And his poor little head, trembling under the weight of it! — 1964 •An owl. •(slang) A penis.He called it “Hooterville,” mainly because he was such a fan of Petticoat Junction, and he really enjoyed getting his hooter worked on. — 2006 •(slang) A large cannabis cigarette. •(old-fashioned) The tiniest amount; a whit or jot.G.G. understood that I meant the licence, and said he didn't care a hooter about failing his driving test. — 1969 formshooters