fackter
A person who thinks they're cool but still gives you the worst advice. Like a f***ing idiot with a little power.
My friend is a fackter. He told me to dye my hair pink, and now I look like a clown.
My mom is a fackter. She told me to eat a whole pizza, and now I'm sick.
My teacher is a fackter. She told me to write a 10-page essay, and I'm still crying about it.