1. Utterly, amazingly, stupendously bitchy in an impressive way.
2. A way to describe a particularly heinous bitchfest, usually used in a sarcastic way...Like bitchin', except NOT cool.

Note: Bitchtacular is a combo of the words "Bitch" and "Spectacular", in case you couldn't figure that out.
1. Wow, you are being totally bitchtacular right now, Heather. Are you PMS'ing or what?
2. Tom: Yeah, my mom just totally went off on my ass.
Greg: So, how did it go?
Tom: It was bitchtacular. How the fuck do you think it went, you dipshit?
Greg: Damn, dude! Now YOU'RE being bitchtacular!
by NINerd October 4, 2008
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A noun used to describe a situation in which a girl gives a guy false impressions of attraction. So the guy proceeds to try and start a relationship while the girl suddenly changes her mind and fucks him over, leaving him to try and figure out what the hell happened.
A girl tells me she is interested. I try and start a relationship because she says that is what she wants. She then changes her mind one fucking week later and wants to be just friends again. That is a bitchtacular at it's finest. Thanks alot kaitlyn, you've inspired me to invent a new word.
by Screwed By You August 12, 2006
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