plumber UK /ˈplʌm.ə/US /ˈplʌm.əɹ/noun 5verb 5forms 3phrases 1 noun5 •One who furnishes, fits, and repairs pipes and other apparatus for the conveyance of water, gas, or drainage.Mario and Luigi's profession is plumbers. •(slang) A person who investigates or prevents leaks of information.It involved the break-in of the office of Mr. Lewis Fielding, Daniel Ellsberg's psychiatrist, by the White House “plumbers.” — 1979 •(slang) A urologist.[…] began the month with an operation at St. Joseph Hospital in Aurora, Ill. His surgeon, by the way, was a "plumber” – urologist. — 1958 •(old-fashioned) One who works in or with lead. •(UK, informal) In the Royal Navy, an apprentice, a boy aged 16 to 18, who is trained in technical skills at the Dockyard Schools to become an artificer. verb5 •(informal, rare) To work as a plumber.Joe Staudinger plumbered so well that on Saturday night boiling water came from both hot and cold faucets. — 1939 •(informal, rare) To work on (something) as a plumber. •(informal, rare) To equip (something) with plumbing. •(US, slang) To botch or ruin.If it was not east of where I had started out, I had plumbered myself sure enough, because I didn’t have the energy to go back the other way. — 1993 •(slang, rare) To do, work, devise (something).The other afternoon Silly here pilfered a melody from the classics, threw a little jazz at it and I plumbered some words. I got a copy of them with me now. Grab this while it’s hot, Joe. — 1925 formsplumbered · plumbering · plumbers Phrases with plumber plumber upTo work on (something) as a plumber; to equip (something) with plumbing.