While I'm quite happy to accept that it's the correct answer, my Scots-English dictionary defines 'fyke' as either a noun meaning 'restlessness' or a verb meaning 'to fidget', 'to jerk' or 'to grieve' .
It's 'fykie' which is defined as meaning (among other things) 'fussy'.
(I wonder how many people here have a Scots-English dictionary on their bookshelves?)
;-)