I know it from an old LP. The Highwaymen or the Brothers Four. Maybe even Chad Mitchell. This is as much as I remember:

There were three jovial huntsmen
A'huntin they did go
They hunted and they hallowed
And gave their horns a blow
Well, lookie there now; lookie there.

On their way a huntin'
They brought a jug of rum
THe first one drank; the second drank;
The third one he drank some
Well lookie there now; lookie there

They hunted and they hallowed
And each one took a swig
They rode along quite merrily
Until they spied a pig
Well lookie there now; lookie there

The first:"'Tis a cow"
The second:"Nay"
The third: "You fools, it's Mrs. Finch with a little Finch on the way
Well, lookie there now; lookie there

They hunted and they hallowed
And passed the jug of rum
'Til they came to a farmer's privy
Then they argued some
Well, lookie there now; lookie there

The first:"'Tis a barn"
The second "Nay"
The third: "You fools, it's a meeting house with the steeple blown away.
Lookie there now; lookie there

They shot to the left; they shot to the right
They blasted all around,
The first one nicked a cricket
Damn near brought him down
Lookie there now; lookie there

The second shot an old dead horse and after several tries
The third one hit the gameskeeper right between the eyes
Well, lookie there now; lookie there

And so these jovial huntesmen
A'huntin they did go
They hunted and they hallowed and gave their horns a blow
Well, lookie there now; lookie there....