Here are the possible solutions for they're all in your head clue
Answer
Clue
Relevancy
haters
Clue
They're gonna do what they do so just turn your head away and hold your palm out
Definition
HATER, one who hates
baconpancakes
Clue
All-in-one breakfast foods popularized by a song from "Adventure Time" (having it instantly get stuck in your head will be your punishment for cheating and Googling it)
pigeons
Clue
If they're dropping by your house, don't stick your head out the window
Definition
PIGEON, to gull or hoax
eyes
Clue
They're all in your head
Definition
EYE, to watch closely
ideas
Clue
They're all in your head
Definition
IDEA, a conception or a plan
caps
Clue
Head coverings (like, you put them on your head)
Definition
CAP, to provide with a type of head covering
doh
Clue
"Yeah, that's what they all say. They all say ___": Chief Wiggum
Definition
a musical note
dab
Clue
Dance move where you duck your head and stick out your arm