sew up

verb

1. To seal by sewing.

   “Amongst the Narrinyeri in South Australia men of the Snake clan sometimes catch snakes, pull out their teeth or sew up their mouths, and keep them as pets.”

2. To bring a matter to a full conclusion that deals with all outstanding issues or other concerns.

   “Threatening to veto the Berkshire offer suggests the fund doesn't have the financing sewn up and is stalling for time.”