Not in perfect mental working order; eccentric, peculiar.
Not in good working condition.
Synonym of crank (“of a ship: liable to capsize because of poorly stowed cargo or insufficient ballast”)
Grouchy, grumpy, irritable; easily upset.
Deviating from the norm; eccentric.
Characterized by or denoting interest centered upon oneself or one's own ways, rather than upon others or the ways of others; self-centered.