(attributive, Internet) A form of Internet security threat, a proxy Trojan horse that infects a web browser and covertly modifies web pages or transactions.

legally (from a legal perspective)

A kind of monozygotic twin exhibiting reversed asymmetry with the other twin in certain physical characteristics.

plural of mirror-image twin

(Canada, US) A tender, flavorful cut of beef from the shoulder of the steer.

(historical, archaic) A railway.

plural of man in black

(sports, informal) The referee. / (ufology) A covert government operative, wearing a black suit and black aviator sunglasses, believed by conspiracy theorists to cover up UFO incidents.

(slang) To intrude or butt in (on something).

(idiomatic) When one makes a significant amount of money. / (idiomatic) When one is successful