стучать лысиной по паркету

стучать лысиной по паркету

stu`chat' `lyis'inoj po par`k'etu

 {literally}

To beat (or stop beating) one's bald spot against the parquet

 {jokingly}  {colloquial}

- asking to stop further explanations since everything is clear enough as it is.

Origin

A famous citation from "The Golden Calf" ("Золотой теленок")

— Ну, довольно? — молвил Остап. — Не стучите лысиной по паркету. Картина битвы мне ясна. — "Now, will that do?" said Ostap. "Stop beating your bald against the parquet! The picture of the battle is clear!"

See also:

don't beat about the bush