rap on (something)

To strike something with one or more quick, light blows, as when getting someone's attention; to knock or tap at something swiftly and lightly. I thought I heard someone rapping on my window in the middle of the night, so I was wide awake with fear until morning! The wind was causing a tree branch to rap on the door in a most unsettling manner.

词组	rap on (something)
释义	rap on (something) rap on (something) To strike something with one or more quick, light blows, as when getting someone's attention; to knock or tap at something swiftly and lightly. I thought I heard someone rapping on my window in the middle of the night, so I was wide awake with fear until morning! The wind was causing a tree branch to rap on the door in a most unsettling manner. See also: on, rap Farlex Dictionary of Idioms. See also: a slew of (something) (one) could use (something) (I) wouldn't (do something) if I were you (one) never would have guessed (one) doesn't give a rip (about something) all right (one) doesn't give a hoot (about something) a/the feel of (something) (one) won't hear of (something) a straw will show which way the wind blows
随便看	the brain drain the brains behind (something) the brains behind something the brains of the/this/that operation the brains of the/this/that outfit the brass ring the breaks the breath of life the bright lights the bright side the British are coming the British disease the bubble bursts the buck stops here the buck stops with (one) the bull must be taken by the horns the bush telegraph the busiest men find the most time the busiest men have the most leisure the business the business end the business end (of something) the butcher, the baker, the candlestick-maker the butler did it the butterfly effect