Meaning of noogie

noog•ie

Pronunciation: (noog'ē), [key]
— n. Slang.
  1. a light blow or jab, usually to a person's head, back, or upper arm and accompanied by a twisting motion, with the extended knuckle of the curled-up second or third finger: done as a gesture of affection or painfully as a prank.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.