break containment

Meanings

1. Of a post or piece of media, to be shown to a larger audience than originally intended; typically either to a non-fandom community or to an outside platform.
2. Used other than figuratively or idiomatically: see break, containment.

Etymology

Originated in this sense the microblogging and social media platform Tumblr. Originally military or science-fiction jargon for something dangerous escaping.