My baby is registered as "Yeager's Sorry Son of a Gun". We call him "Pistol". When he was little he crawled inside my DH's work boot and went to sleep. When DH went to put his boot on he discovered he pup was inside

and he said " If I would have been in a hurry you would have been a sorry son of a gun ! " Hence his registered name. We wanted a nickname that tied in with his registered name

and came up with Pistol. Believe me he lives up to it. He is a little pistol.