Acronym for Keyboard Headbang.
A KBHB is when someone says something really obvious that you have been trying to get them the realize and/or they say something incredibly stupid, thus causing you to smash your forehead into your keyboard and imprint your face with an indent of a spacebar.
Artem: "AHA! Cryptography isn't the study of dead people, but rather the study of codes and ciphers!"
A hardo is a person who tries extremely hard at everything. Most times a hardo will try very hard at things that do not require excessive effort. For example, sports practices, gym class, etc.
Wow did you see Jack at practice today? What a hardo!