(used of boats) inclined to heel over easily under sail

easily irritated or annoyed; "an incorrigibly fractious young man"; "not the least nettlesome of his countrymen"

Disgruntled, easily annoyed, and not to be messed with.

Addicted to crotchets and whims; unreasonable in opinions; crotchety.

Unsteady; easy to upset; crank.

Full of spirit; crank.