Wayster

n.

A useless person

In use

Yer some wayster boy! Yer a complete waste o' space!

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

How marvellous! A visitor with curiosity. Would you like me to translate 'Wayster' in use for you?

You are an absolute wastrel, old boy! A complete waste of space!