h3llo

(noun)

Will make those who witness their creations...
A) facepalm
B) cry
C) scream
D) jump out of a window
E) all of the above

Also unbelievably insane, stupid, and lazy. The term can also be used as an adjective to describe anyone who has a mental breakdown every three seconds, or anyone without any brain cells.

Person 1: h3llo makes me want to commit drink poisoned tea.
Person 2: Why, what did they do?
Person 1: Bo.