Cut some meat quickly! (4-4)
I believe the answer is:
chop-chop
'quickly' is the definition.
('chop-chop' can be a synonym of 'quickly')
'cut some meat' is the subsidiary indication.
'cut' becomes 'chop' (chop is a kind of cut**).
'some meat' becomes 'chop' (chop is a kind of meat).
'chop'+'chop'='chopchop'
(Other definitions for chop-chop that I've seen before include "Quickly!" , "Get a move on!" , "Hurry up!" .)