sit on

/S IH1 T AA0 N/
verb
  1. 1

    To block, suppress, restrain.

    โ€œThe chairman sat on the report until the end of the legislative session.โ€

  2. 2

    To restrain (a person).

    โ€œHe started to act up, but she sat on him.โ€

  3. 3

    To take no action on.

    โ€œI sent the boss my proposal three weeks ago and he's been just sitting on it.โ€

  4. 4

    To be a member of.

    โ€œHe sits on the appropriations committee.โ€

  5. 5

    To hold an official inquiry regarding; to deliberate about.

  6. 6

    To have but not actively use

Source: https://en.wiktionary.org/wiki/sit%20on