'Goer' reminds me of the phrase, 'go it, Jim!' (or any name) used in the South years ago and now perhaps obsolete. It meant 'put the pedal to the metal' or equivalent (do your best!).
Not the same as 'goer' but 'go' has been a part of many slang phrases or words.

Good poem!
I presume 'brief' in the above means a lawyer.
'Chav' I don't recall seeing before.

'I seen' seems to be more common than "I saw' on both sides of the Atlantic, among the 'educationally disadvantaged'.