GRE grumpy Definition Easily annoyed or irritable; in a bad mood. Example "She was grumpy until she had her morning coffee." Sign in to save GRE Quiz → ← grumble guarantee → Study tips featuring "grumpy" Group Words Together by Emotional Tone Force Contrast Between Two Similar Words Uncover the Hidden Stories Behind GRE Words Related words GRE awe GRE smithereens GRE abacus SAT abase GRE abash GRE abate GRE abbreviate GRE abbreviation SAT abdicate SAT abdomen GRE abduct GRE aberrant