acker Also akka, akker noun, military 1: A piastre, especially an Egyptian piastre (a coin of low denomination). (1937 —) . 2: Money, cash; coins or banknotes; usu. in pl. (1939 —) . H.R.F.Keating I can't offer a great deal in the way of ackers. Though you'd get your ten per cent, old man (1965).
[Prob. from Arabic fakka small change, coins; apparently first used among British and allied troops in Egypt.]