Definition of rhubarber in English:

rhubarber

noun

  • 1A person who grows rhubarb.

  • 2Slang (originally Theatre). Originally: an actor who repeats the word ‘rhubarb’ so as to represent an indistinct conversation or the noise of a crowd. Now also (more generally): a person who mumbles or speaks indistinctly.

Origin

Early 20th century; earliest use found in Munsey's Magazine. From rhubarb + -er.

Pronunciation

rhubarber

/ˈruːbɑːbə/