clock (someone or something) at (a certain speed)

clock (someone or something) at (a certain speed)

To track the speed at which someone or something moves. (The speed is stated after "at.") You're getting a ticket because I clocked you at 90 miles an hour—and the speed limit here is only 55.
See also: certain, clock
Farlex Dictionary of Idioms.

clock someone or something at something

to measure the speed of someone or something to be a certain figure. I clocked the runner at a record speed for the race. Karen clocked the race at three minutes flat.
See also: clock
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • clock at
  • speed merchant
  • speed demon
  • turn of speed
  • a turn of speed
  • speed up
  • double nickels
  • clock (someone or something) at speeds of (some amount)
  • clock at speeds of
  • full steam/speed ahead