Grouchy, grumpy, irritable; easily upset.
Not in good working condition.
Synonym of crank (“of a ship: liable to capsize because of poorly stowed cargo or insufficient ballast”)
Not in perfect mental working order; eccentric, peculiar.
Easily excited; set off by the slightest excuse; easily enraged or inflamed.
Incapable of burning; not easily set on fire.
Capable of burning; easily set on fire.
Any inflammable substance.