It’s like Donnie Brasco "Forget about it". It can mean anything...
How are you? Gedon.
You twat. Yeah... Gedon.
Hows your mum? Gedon
Morning. Gedon
You fukin wont sum? Gedon
Alright? Gedon

Gedon

Cornish. Derived from the words "Get" and "on".
Gedon has become janner for almost everything.

Gedon!