Definition of rhubarbative in English:

rhubarbative

adjective

  • Bad-tempered, fractious, disagreeable.

Origin

Early 17th century; earliest use found in Matthew Sutcliffe (d. 1629), dean of Exeter. From rhubarb + -ative, after Middle French reubarbatif, alteration of rébarbatif after reubarbe, either punningly or through folk-etymological association (probably with similar motivation).

Pronunciation

rhubarbative

/ˌruːˈbɑːbətɪv/