Definition of rumgumptious in English:

rumgumptious

(also rumgumshus, rumgumtious)

adjective

Northern, English Regional, Scottish, East Anglian
  • Strong-willed, headstrong; quarrelsome.

Origin

Late 18th century; earliest use found in John Hutton (1739–1806), writer on topography and etymology. From rumgumption: see -ious.

Pronunciation

rumgumptious

/rʌmˈɡʌm(p)ʃəs/