Noogie
A school prank is a prank primarily occurring in a school setting. The effect and intent of school pranks may range from everyday play and consensual bonding behavior to crimes including hazing, bullying and assault, including sexual assault.
Wikipedia
Nuggie (noun)
A chicken nugget.
Noogie (noun)
An act of putting a person in a headlock and rubbing one’s knuckles on the other person’s head, often a playful gesture of affection when done lightly.
Noogie (verb)
To perform a noogie on.
Wiktionary