double take, do a

do a double take

To look twice due to surprise or disbelief. Everyone did a double take at his shiny new sports car as he drove by. Men and women alike did a double take when they saw him in his tuxedo.
See also: double, take
Farlex Dictionary of Idioms.

double take, do a

Show a delayed reaction to an unusual remark or circumstance; also, look at something or someone again. For example, He did a double take when his ex-wife appeared at his wedding. [1930s]
See also: double
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • do a double take
  • a double take
  • double take
  • taker
  • a double taker
  • at the double
  • on the double
  • double
  • double sawbuck
  • dub