Commonly used on the app Discord. Can be used as a response for literally anything. Usually as a form of a GIF, so there would be a GIF of someone dancing with text saying "There's a pipebomb in your mail box."
A conversational pipebomb is when someone (usually the guy only kept around out of pity) destroys all momentum of a social interaction with a single phrase or opinion typically awkward, offensive, or ignorant. This usually results in:
1. everybody in the group becoming angry and the once civil conversation devolving into an argument
2. total silence occasionally interrupted with a half hearted attempt at a joke or topic (which is always shot down)
3.everybody leaving
John: Did you guys hear about that shooting recently?
It means that 2 video game characters are dancing with a text box "There's a pipebomb in your mailbox" its also means that there is LITERALLY a pipebomb in your mailbox. You could use it for trolling someone like on discord, tiktok etc. Yeah, don't fall for someone who posted 2 video game characters dancing on you like they're basically taunting you.
Me: "damn.. i actually wondered if something bad happens while i check the mail."