spit it out
US /spɪt ɪt aʊt/
UK /spɪt ɪt aʊt/

1.
はっきり言う, 言いたいことを言う
used to tell someone to say something they are unwilling to say
:
•
Come on, spit it out! What's the big secret?
さあ、はっきり言って!一体何がそんなに秘密なの?
•
He looked like he had something to say, so I told him to just spit it out.
彼は何か言いたげだったので、私は彼にはっきり言ってと促した。