A form of liability insurance that is in excess of specified other policies and also potentially primary insurance for losses not covered by the other policies. When an insured is liable, the insured's primary insurance policies first pay up to their limits, and then any additional amount is paid by the umbrella policy up to its limit.

(slang) A person or group that functions as warm bodies, especially those who serve no useful purpose.

(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)

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

(proscribed) Alternative form of home in.

in no sense / never ever; not for any reason