Here are the possible solutions for having a big head clue
Answer
Clue
Relevancy
foamy
Clue
Having a big head?
Definition
covered with foam
scary
Clue
Like either option in "Would you rather watch a video of your parents having sex or your parents watch a video of you having sex?"
adream
Clue
Having visions in one's head?
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)