When you’ve been talking to a girl for so long and you get to know her so much and then all of a sudden she switches up on you turns into a different person and makes you hate her. .....the light switch Bitch.... here one second; gone the next.
The Light Switch Bitch is the girl that you have been talking to you makes you feel like you know her, then out of nowhere she switches up on you .

Friend: don’t worry about her, Tanisha just a light switch bitch...it’z what she do
You: I know but she made me feel like I was the only one. I gave her all my energy and time. Then her personality DIPPED!

Friend: wow what a light switch bitch!
by Twitch: TTVDeepReef February 25, 2021
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TLSB is basically a female that makes you think and feel as if they care about you, and as you get to know them they switch up on you for no reason, and leave without explanation. ...how rude...what a Light switch Bitch (TLSB for short)
The Light Switch Bitch TLSB for short is a female who switches up on you out of no where...

Her: “I can’t F*ck with you no more”

Him: “I gave you all my energy Danisha and all my time”

You’re friend: “dude just drop her, she’s a Light Switch Bitch anyways”
by Twitch: TTVDeepReef February 25, 2021
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A woman who goes from being awesome and friendly to a complete bitch faster than you can blink. In these women, it will seem almost as if a light switch is flipped inside of them and BAM! they will morph into bitchy bitches.
(In the weight room)

Girl coach: How was your night?!
Athlete: Great thanks for asking!
Girl coach: WHY AREN'T YOU DOING ANYTHING?! GET TO WORK DAMMIT! YOU'RE SQUATS ARE TERRIBLE!
Athlete (to fellow athlete): Coach is such a light-switch bitch.
by Alison Von October 17, 2010
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