Definition of "oom" []

• In Dutch, uncle: used like Eng. uncle, as a title of mention and address: as, Oom Paul, the popular name of Paul (Stephanus Johannes Paulus) Kruger, president (1883–1900) of the late Transvaal Republic. (noun)

The Century Dictionary (Public Domain)

• "A small but genuine tuba hung from his slender shoulders, and there were more strings attached to his elbows, which moved back and forth in time to "oom" and "pah" respectively."
• ""We children respectfully addressed them as 'oom' and 'tannie'.""
• "Most tuba players agree that if their unwieldy instrument has shed any of the bad associations that have clung to it - orchestral clown, herald of grim news, poorly respected back-bencher best when not noticed, good for little more than the "oom" in the oom-pah-pah -"