sweep off feet

sweep (one) off (one's) feet

To charm one in such a way that they form an instant and strong romantic attraction, usually unexpectedly. A: "Is Lucy still gushing about her new boyfriend?" B: "Yeah, he must have really swept her off her feet."
See also: feet, off, sweep
Farlex Dictionary of Idioms.

sweep (someone) off (someone's) feet

To cause someone to be admiring or infatuated.
See also: feet, off, sweep
American Heritage® Dictionary of the English Language, Fifth Edition.

sweep off one's feet, to

To overwhelm; to carry away with enthusiasm. This metaphor suggests knocking a person down, or at least sideways, in the process of making an impression. The term, also put as to carry someone off his feet, dates from the nineteenth century. Clarence Day used it in The Crow’s Nest (1921): “You can’t sweep other people off their feet if you can’t be swept off your own.”
See also: off, sweep
The Dictionary of Clichés by Christine Ammer
See also:
  • sweep (one) off (one's) feet
  • sweep one off feet
  • sweep somebody off their feet
  • sweep someone off their feet
  • be head over heels (in love)
  • fall head over heels in love
  • fall head over heels in love with (someone)
  • pull the carpet (out) from under (one's) feet
  • pull the carpet/rug out from under somebody's feet
  • pull the rug out (from (under) one)