verbal bomb

A stinging insult, harsh criticism or shocking revelation directed at a person or group of people. Plural-verbal bombs. rebuke, retort, rebuff, verbal assault, criticism, insult, angry response, snarl, yell, speak, talk, conversation, engage, psychological colonoscopy

I can see you are getting along with my parents splendidly. I don't think dropping the verbal bombs about your past drug use and sexual experimentation in college made this meeting easier.