throw someone a curveball

US /θroʊ ˈsʌm.wʌn ə ˈkɜrv.bɔl/
UK /θroʊ ˈsʌm.wʌn ə ˈkɜrv.bɔl/
"throw someone a curveball" picture
1.

to present someone with an unexpected difficulty or challenge

:
•
The boss really threw us a curveball with that last-minute change to the project.
•
Life can sometimes throw you a curveball when you least expect it.
:
throw yourself at someonethrowthrow-inthrow onthrow inthrow someone under the busthrow out