Took a knock - Idioms by The Free Dictionary
take a knock (redirected from took a knock)
take a knock
To be diminished, injured, or negatively impacted in some way. Our profits are going to take a knock if we don't start reducing our manufacturing costs. He's taken some knocks out there tonight, and it looks like it's affecting his game.
take a knock suffer a material or emotional setback.
take a (hard, nasty, etc.) ˈknock have an experience that makes somebody/something less confident or successful; be damaged: His reputation has taken a bit of a knock since the newspapers printed stories about his private life.