knock
knock someone's block off hit someone very hard in anger. informal
☞ Block is used here in its informal sense of 'head'.
knock someone dead greatly impress someone. informal
1991Julia PhilipsYou'll Never Eat Lunch In This Town Again I'm good at public speaking. I've been knocking them dead at seminars.
knock someone for six: see hit someone for six atsix.
knock someone into the middle of next week hit someone very hard. informal
knock it off used to tell someone to stop doing something that you find annoying or foolish. informal
knock someone off their perch: seeperch.
knock on (or at) the door seek to join a particular group or sphere of action.
knock someone or something on the head decisively prevent an idea, plan, or proposal from being held or developed. British informal
☞ The image in this phrase is of stunning or killing a person or an animal by a blow to their head.
knock on wood: see touch wood atwood.
knock someone sideways affect someone very severely; make someone severely depressed or unable to cope. informal
1998Penelope LivelySpiderweb It's always knocked me sideways-the thought of what we carry around, stashed away.
knock someone's socks off: seesock.
knock something into a cocked hat: seecocked hat.
knock spots off easily outdo. informal
☞ This expression may refer to shooting out the pips (spots) on a playing card in a pistol-shooting competition. Although it is now found chiefly in British English, the phrase originated in America.
2012Daily Telegraph Julian Temperley, traditionalist cider-maker, faces down the Eurocrats' regulations that pander to the French by making his own English cider brandy (knocks spots off Calvados).
knock the stuffing out of someone: seestuffing.
knock them in the aisles amaze and impress people. informal
knock your head against a brick wall: see bang your head against a brick wall athead.
knock someone or something into shape: see lick someone or something into shape atshape.
opportunity knocks: seeopportunity.
the school of hard knocks: seeschool.
take a knock suffer a material or emotional setback.
you could have knocked me (or her, him, etc.) down with a feather I (or she, he, etc.) was greatly surprised. informal
☞ A similar idiom is found in Samuel Richardson's novel Pamela (1741) ('you might have beat me down with a feather'); the modern form of the expression with knock dates from the mid 19th century.
your knees are knocking: seeknee.