let someone stew in their own juice

let someone stew in their own juice

or

let someone stew

If you let someone stew in their own juice or let them stew, you deliberately leave them to worry about something they have done and do nothing to comfort or help them. The coach refused to put an arm round the 23-year-old afterwards — choosing, instead, to let Taylor stew in his own juice. Leave her alone — let her stew. Give her time to reflect on how stupid she's been. Note: You can also say that you leave someone to stew. I thought I'd leave him to stew for a while.
See also: juice, let, own, stew