1) Young dog 
`Bullpup` describes a modern firearm configuration in which the action and magazine are located behind the trigger group and alongside the shooter`s face, so there is no wasted space for the buttstock as in conventional designs. This permits a shorter firearm length for the same barrel length for improved maneuverability, and reduces weight. Or......
a firearm configurations in which both the action and magazine are located behind the trigger.
Bullpup is a type of small arm where the mechanism behind the trigger occupies space normally taken up by the butt, thus resulting in a shorter weapon than a conventional layout.