ChetvI'

A chetvI' was a type of Klingon hand-held weapon which resembled a Terran spear thrower.

Description
A chetvI' consisted of a rod with a hook at the end, which the user mounted with a spear in order to hurl it at great speeds. Normally a specialized kind of spear called a tlhevjaQ would be used for this purpose. 

Modern weaponry
The word chetvI' is sometimes used to describe a particular kind of torpedo tube, rather than the standard term DuS.