What is the meaning of Knock_back?

To stun; to surprise.

To drink an alcoholic beverage swiftly or often; to finish a beverage.

To push or strike someone or something backward with force.

To withstand or endure a difficult situation or setback.

To achieve a significant accomplishment or success.

To reject; to refuse.

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

Source: wiktionary.org