1. Easily irritated or annoyed
   "an incorrigibly cranky young man";
   - fractious, irritable, nettlesome, peevish, peckish [N. Amer, informal], pettish, petulant, scratchy, testy, tetchy, techy, pouty, narky [Brit, slang]
    
2. (used of boats) inclined to heel over easily under sail
   "The small, cranky sailing boat required careful handling in strong winds";
   - crank, tender, tippy

Derived forms: crankier, crankiest

See also: ill-natured, unstable

Encyclopedia: Cranky