This is a great song. Andy Steward also does a version which has a little better meter. I have researched some of the words and have found the following;

cant - auction

humbug - flattery

jibe - conjole

wisp - bundle of straw

wipe - rag

swiper - from swipe (cheap beer)

luck penny - small return from sale given for luck

Please, does anyone know what a gommach is?

Tim