The Double Barrel

Around here years ago there lived a man called the Cat(He had whiskers).There also lived a man called the  Goat (I'll leave that to your imagination.).Also the Mountain Ass (another imagination job ).
Anyhow the Cat was a very  masculine and extremely active man.And witty too.
His wife had twins.He was celebrating with my uncle and after a (good ) few my uncle said ,effusive in his praise of the recent births.that he ws some man for one man,or words to that effect.
"not one bit better than you Joe ,only I have a double barrel."
There after he was alternatively referred to as "The man with the double barrel b...."