pell-mell
Concise Oxford English Dictionary © 2008 Oxford University Press:
pell-mell/pelˈmel/
▶adjective & adverb in a confused, rushed, or disorderly way. ▶noun a confused mixture; disorder.
– origin C16: from Fr. pêle-mêle, from earlier pesle mesle, mesle pesle, reduplication from mesler ‘to mix’.
'pell-mell' also found in these Oxford entries:

