sweep/brush something under the carpet
sweep something under the carpetBRITISH
COMMON If you sweep a problem under the carpet, you try to hide it and forget about it. People often hope that if they sweep something under the carpet the problem will go away, but that is not the case. Note: Verbs such as brush and push are sometimes used instead of sweep. The problem has been brushed under the carpet for decades. Note: The usual American expression is sweep something under the rug.
sweep something under the carpethide or ignore a problem or difficulty in the hope that it will be forgotten.
1996 Iain Pears Death & Restoration Many others would merely have swept all our problems under the carpet, and left them until they became too difficult to solve.