What does BOS stand for?

Brat over shoulder

When a younger sibling watches your device's screen, you might message "BOS" to let the recipient know that your device is being monitored. It is similar to SOS but is meaner since it stands for "brat over shoulder."

Most people send BOS when texting and messaging online, like on social media or chat rooms. For example, a person may send it to warn a person not to send sensitive information, a graphic image or video, or a vulgar song.


BOS, so don't say too much!

That annoying BOS

Related Slang


Updated February 14, 2022

BOS definition by

This page explains what the acronym "BOS" means. The definition, example, and related terms listed above have been written and compiled by the team.

We are constantly updating our database with new slang terms, acronyms, and abbreviations. If you would like to suggest a term or an update to an existing one, please let us know!