when a person suddenly changes their behavior towards you for the worst.
Aw man, I used to fuck with her heavy but she switched up.
by lightbrownsugar May 13, 2016
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When you used to be close with someone and now you're not because they're not who they try to appear to be.They've given you a reason to change up your whole attitude and perspective.You were friends with them and kind of low and now you've become your own and you're on top.
Kim K switched up after she left Paris Hilton's entourage.
by Whatactuallyhappened March 9, 2016
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Someone who changes actions or mannerisms at a moments notice with friends or associates.
Niggas will switch up that fast these days...
by 012396DaRealest March 10, 2017
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When a person acts differently either because they don't wanna hang out with you no more or they feel they too good for you. IT'S WRONG DON'T DO IT.
I remember my girl Kylie we used to hang out all the time but now she switching up so I don't fuck with her no more
by peakofthegeek September 17, 2017
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To change state of mind or leave, usually when one is hostile.
You better switch up real quick before I give you a can of whoop ass.
by Imallaboutthatlife February 6, 2017
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Someone who uses on off pleasantness.

Usually kind to turn sour.
And is actually just an asshole
Ew Switch ups
by Mr. Msbehavior January 1, 2020
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