knock back

Short definition from Wiktionary

Verb

1. 1
   To stun; to surprise.
2. 2
   To drink an alcoholic beverage swiftly or often; to finish a beverage.
3. 3
   To push or strike someone or something backward with force.
4. 4
   To withstand or endure a difficult situation or setback.
5. 5
   To achieve a significant accomplishment or success.
6. 6
   To reject; to refuse.
7. 7
   To press or knead (dough) so as to remove air bubbles.

Noun

1. 1
   Alternative form of knockback.