The Ballyhoo or Bally (Hemiramphus brasiliensis), is a baitfish of the halfbeak family, Hemiramphidae. Ballyhoo are frequently used as cut bait and for trolling purposes by saltwater sportsmen. A big variety of fish love ballyhoo. Its one of the greatest known fish to catch Sailfish on.

Ballyhoo is also used in colloquial English to refer to brashness or flamboyance. The term Ballyhoo is used to indicate that one is using any means necessary to inflate an object or idea to a status to which it does not rise. This references the bait fish in that selling ballyhoo requires deceitful advertising.

Also in Live Event Production, Ballyhoo is a verb that describes randomly flashing and moving lights around the room to create, add to or amplify the excitement of the moment.