spring on

US /sprɪŋ ɑːn/
UK /sprɪŋ ɑːn/
"spring on" picture
1.

to suddenly present something to someone, especially in a surprising or unexpected way

:
•
Don't spring that question on me now; I need time to think.
•
They decided to spring the news on him at the party.
:
surprise withpresent suddenlydrop onthrow at
:
springspring forbox springspring rollspring onionspring upspring-cleaning