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