'murdering piece' definitions:

Definition of 'murdering piece'

From: GCIDE

Murderer \Mur"der*er\ (m[^u]r"d[~e]r*[~e]r), n.
1. One guilty of murder; a person who, in possession of his reason, unlawfully kills a human being with premeditated malice. [1913 Webster]
2. A small cannon, formerly used for clearing a ship's decks of boarders; -- called also murdering piece. [Obs.] [1913 Webster]