flog a dead horse saksaksi - Sanakirja.org (englanti-saksa)

Käännös		Konteksti
Verbit
1.	seine Zeit verschwenden	idiomaattinen, brittienglanti
2.	sich vergeblich bemühen	idiomaattinen, brittienglanti
3.	auf etwas herumreiten	idiomaattinen, brittienglanti

(dated, nautical) To attempt to get extra work out of a ship's crew during the dead horse period.
(British, idiomatic) To attempt to get more out of something that cannot give more; to attempt to arouse fresh interest in something that is either hopeless or already settled.