put/stick the knife in (redirected from stick the knife in)

put/stick the knife in (British & Australian, informal)

to do or say something unpleasant to someone in an unkind way. 'No one in the office likes you, you know, Tim', she said, putting the knife in. The reviewer from The Times really stuck the knife in, calling it the worst play he'd seen in years.

See also: knife, stick