B.O.B

Balls of Bedrock. Basically someone who is extremely daring such that they have "balls" or "guts" of bedrock. It is normal to be fearful of such persons, as they will go on to do anything and still not feel shame or embarrasment. The term "Bedrock" comes from Minecraft, which is so hard that no axe can break it!

Look at that guy, he's B.O.B.! He stripped his shirt in front of the entire class for a dare!