jacela
A jacela is a sweet and stupid person who will help you out if you ask nicely, but will cuss you out if you don't. They're like a best friend, but with more attitude and less brain.
I asked her for help with math and she said yes, but then she cussed me out for being dumb.
She was my best friend, until she called me a dumbass in front of everyone.
I asked her for a ride and she said yes, but then she cussed me out for being late.