knock back

verb
  1. 1

    To stun; to surprise.

    โ€œI was knocked back by the sheer size of the hall.โ€

  2. 2

    To drink an alcoholic beverage swiftly or often.

  3. 3

    To reject; to refuse.

    โ€œHow many job seekers did you knock back today?โ€

  4. 4

    To press or knead (dough) so as to remove air bubbles.

Source: https://en.wiktionary.org/wiki/knock%20back