Yeah, I had a look on the Urban Dic, and although they were bang on with Meader, their Jitter entries seemed to have been entirely written in the last fortnight. It goes way back before skaters. Folks I know who've lived there all their lives reckon they were called it in their yoof.
Mind you, me missus is a life long local (unlike my migratey self) and she reckons she's never heard either in her life!
Doesn't know much about anything much at all