noogie

/N UW1 G IY0/
noun
  1. 1

    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.

Synonyms

verb
  1. 1

    To perform a noogie on.

Source: https://en.wiktionary.org/wiki/noogie