1
general::
Phrase(s): knock something out of something
to beat or knock on something until something comes out. • Timmy knocked the stuffing out of his pillow. • Someone knocked the coins out of my piggy bank., Phrase(s): knock something out of someone
to beat someone until something emerges or dissipates. • Max knocked the truth out of the spy. • Lefty knocked the story out of Max.
McGrawhill's American Idioms And Phrasal Verbs