A google search (fiddle, flake, tune) yields these pages with the appropriate paragraphs pasted herein. It looks like flaked is indeed a "fiddle word". Perhaps something to do with the snowfall effect of the rosin...


http://www.shantalla.com/reviews_live.html

"The band works very much as a team with three lead instruments out front accordion, fiddle and
         uilleann pipes backed up with subtle guitars, bouzouki, and bodhran rhythms. Gerry Murray's
         piano accordion blends with Kieran Fahy on fiddle and piper Michael Horgan to provide a sturdy
         frontline that can flake it out with the best of them while also allowing a delicious subtlety in both
         style and approach."

And also
href="http://home.hccnet.nl/h.speek/irishbox/Cooley/cooley.html">http://home.hccnet.nl/h.speek/irishbox/Cooley/cooley.html

(A review of a Joe Cooley recording.)

"The double jig - "Daniel O'Connell" -
which follows brings vividly to mind Cooley's
last day playing. It was in Kelly's Bar, in Gort
that a small number of people had gathered on
a Sunday midday to hear Joe. Des Mulkere and
myself helped him to flake out the old mountain
reels, and as the two o'clock closing hour drew
on, a number of young musicians made their
way in from Galway where they had given a
concert the night before - there was Triona Ni
Dhomhnaill, a traditional singer of twenty-one,
Paddy Glackin, a young fiddle player, and
others... "