mugger

[GrokHaw]

a robber who takes property by threatening or performing violence on the person who is robbed (usually on the street)

[CarinMusic]

A thief who takes property by threatening (or performing) violence on the person who is robbed; a person who commits a mugging; one who mugs. See mug, v. t.

[Konraddync]

A person who makes exaggerated faces, as a performance; a gurner.

[Konraddync]

A mugger is a person who attacks and robs another person, typically in a public place. The crime they commit is referred to as mugging. This is often achieved by using a combination of intimidation, threat, or actual physical violence.

[Sommer]

A large crocodile Crocodilus palustris of southwest Asia, having a very broad wrinkled snout.