Stands for "The worst
bitch" Usually used towards a close female friend or girlfriend. However this is, not a term of endearment, rather TWB acts like a
bitch at times but fails at being very
bitch-like. TWB also makes sure to keep a calm demeanor because secretly she is part of an alien race bent on destruction of the planet.
IRL:
Me: You make
terrible sandwiches, you're the worst
bitch!
TWB: Shut up
Txtng:
Me: u make terble sandwiches u r twb
TWB: You are really bad at spelling