explode a bombshell explode a bombshell /ɪkˈsplod ə ˈbɒmʃɛl/

verb

1. Utter or do something surprising  ( explode a bombshell )
   utter or do something surprising
    Father exploded a bombshell when he forbade us to go to the prom
   Father exploded a bombshell when he forbade us to go to the prom