A person or thing that disturbs, disquiets, or interferes with peace or quiet; one who causes tumult or disorder; a troubler.

One who or that which troubles (in any sense); a disturber; an oppressor.

One who troubles or disturbs.

A person given to fighting or quarrelling; a troublemaker. See also Sim Shakebuckler n. at Sim, n.1 1b.

An evil person, suggestive of a creature from hell; a monster. Now usually: a person who causes trouble or creates chaos, esp. by wild or…

(also attributive)

one who seeks sorrow, etc.

A rowdy, troublesome, or disreputable person; a mischievous child.

In wider use: an unruly or noisy person, a troublemaker.

a person who behaves immorally or makes trouble.

A disagreeable, disreputable, or contemptible person or (occasionally) thing, a ‘scumbag’; (also, Australian) a wayward or eccentric person, a crank.

= disturber, n. 1.

slang (chiefly Nautical). A habitually insubordinate or disruptive person; a troublemaker. Now rare.

colloquial. Irish English and U.S. A troublemaker, a thug.

A person who takes pleasure in causing trouble or discord; an agitator, a troublemaker.