One of the letters that can mistakenly appear when one tries to press the spacebar and does not notice that b has it instead.
Hey maxbjust checking up on how you're doing.
the fucking second letter of the alphabet why are you searching 'b'?
b
B
The word is a derivative of Brother, was, through usage, shortened to Bro, and finally condensed to just B.
"'sup B?"
"get your ass over here B"
"Me and B are gonna book it down town"