spring on
US /sprɪŋ ɑːn/
UK /sprɪŋ ɑːn/

1.
surpreender com, apresentar de repente
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.
Não me surpreenda com essa pergunta agora; preciso de tempo para pensar.
•
They decided to spring the news on him at the party.
Eles decidiram surpreendê-lo com a notícia na festa.