an unimportant or stupid person; dope.
ass, donkey, twit, blockhead, pinhead, lightweight, nerd, dolt, bonehead, oaf, half-wit, idiot, nitwit, buffoon, moron, nincompoop, fool, goof, jerk, dullard
Origin of schnook
An Americanism dating back to 1945–50; of uncertain origin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
US slang a stupid or gullible person
Word Origin for schnook
from Yiddish shnok, variant of shmok schmo
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
1948, probably from Yiddish shnuk "elephant's trunk," or altered from schmuck (q.v.), or perhaps from German schnucke "a small sheep," used in U.S. Yiddish for "a customer easily persuaded, a sucker."
Online Etymology Dictionary, © 2010 Douglas Harper