sweep (something) under the rug, to

sweep under the rug

Hide something, as in Their attempts to sweep the scandal under the rug were not very successful. This idiom alludes to sweeping dust under the rug, so it won't be seen. [Mid-1900s]
See also: rug, sweep

sweep under the rug

To avoid discussing or dealing with (something negative or troubling).
See also: rug, sweep

sweep (something) under the rug, to

To conceal something. This allusion to hiding household dust or debris by sweeping it under a rug or carpet was used figuratively only from the mid-twentieth century. It appeared in the Boston Globe in 1979: “Attempts to sweep the Chappaquiddick scandal under the rug have not succeeded.”
See also: sweep