Definify.com
Webster 1913 Edition
Tilly-vally
Til′ly-valˊly
,int
erj.
, adv.
, or Adj.
A word of unknown origin and signification, formerly used as expressive of contempt, or when anything said was rejected as trifling or impertinent.
[Written also
tille-vally
, tilly-fally
, tille-fally
, and otherwise.] Shak.