cover up

verb

1. To conceal or disguise.

   “The politician tried to cover up his involvement in the scandal.”

   “Even when [the mechanics] didn't know how to fix everything, they never cheated anybody or covered up. So over the years they kept learning new makes and new techniques, and now can repair about anything.”

2. To clothe; to conceal one's private parts.

   “Cover up, slut!”

3. To put covers over oneself in bed.

   “Please cover up and go to sleep now.”