subs. phr. (old).An amateur gun; a PLASTERER (q.v.).GROSE (1785).
1614. The Cold Year [NARES]. It was a shame that poore harmlesse birds could not be suffered to save themselves under a bush but that every paltrie PETER-GUNNER must shoote fire and brimstone at them.
1633. SHIRLEY, The Witty Fair One, ii. 2. I smell powder this PETER-GUNNER should have given fire.