Definitions by Simon Griffin

Dlo Fish 

Old splet backwards; pronounced deelow. Used in cafes, restaurants and fish and chip shops when referring to stale, poor quality or old fish. The word is used in secrecy to the customer, as a code to instruct the serving of poor quality fish.

A: That customer's always rude to me.
B: That's okay, just give dlo fish from now on.

Dlo Fish by Simon Griffin January 20, 2009