I did a trawl about the song. Some versions have...

Oh come all ye tramps and hawker lads ye gatherers oblaw
That tramps the country round and round come listen one and all
(http://www.celtic-lyrics.com/forum/index.php?autocom=tclc&code=lyrics&id=406)

braxie ham (from the argot of the UK travelling people, also "braxy") putrid. In the well-known "Tramps and Hawkers", a "braxie ham" was any type of meat taken from a long-dead animal and purified to some extent by packing it in salt.... uck

I have it on an CD by the Corries.