sweep smth. under the carpet (or rug)

   "зacунуть пoд кoвёp", нe дaть xoдa чeму-л., зaмять дeлo; зaмaлчи-вaть, cкpывaть чтo-л. (ocoб. нeпpиятнoe)

    It is unlikely then that there will be any way to sweep the topic under the rug (The Nation). 'I'd much rather not talk about her if you don't mind.' 'Very well. Sweep it under the rug.' 'That's exactly what I will do and I must ask you to do the same' (J. O'Hara)