material safety data sheet, n an informational form detailing the chemical and physical properties, hazards, and ways of safely handling a toxic chemical.
BRB means be right back. It is one of the most commonly used acronyms in online chat and texting. It communicates that the person is leaving for a moment, but will be back shortly.
A message in a bottle (abbreviated MIB) is a form of communication in which a message is sealed in a container and released into a medium, archetypically a bottle released into a large body of water.