Gaffett
A girl version of a gaffer. She's not just a gaffett, she's a gaffett with attitude and a bad hair day. She'll call you names and say you're a gaffett in front of your whole class.
You're not just a gaffett, you're a gaffett who can't even spell gaffett right.
That girl is a gaffett and she thinks she's the queen of the school.
Your crush is a gaffett and she's got a crush on a gaffer.