Energy whip

An energy whip is a Ferengi hand-held weapon, which shoots a pulse of energy when lashed.

Energy whips were used by Ferengi marauder Ulis during his raid on the Earth starship Enterprise in 2151, and by the Ferengi landing party at the Delphi Ardu system in 2364. 

Law enforcement officer on Ferenginar were normally armed with energy whips. 

The Marauder Mo action figure included a toy energy whip as an accessory.