Bayste

n.

A person of gargantuan proportions. Also Bayshte.

In use

He was such a big bayste of a man you could play handball offa de broadness of hees arse!

Let Lawrence Muck translate it to posh English for you
Lawrence Muck

Good evening, and welcome to the parlour. Would you like me to translate 'Bayste' in use for you?

He was such an enormous brute of a man that one could play handball off the breadth of his posterior!