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 06, 2017
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 09, 2017
when ur mood is calm , then someone does something, they your mod faes up and you are really mad in an instance, uve switched up
happy boy, someone steps on his toe at goose fair, boy switches up and starts smackin' the place out
by JunioR SkYline October 02, 2003