To be approved; be chosen: Therewere a dozen other bids but McCulloch got the nod(1940s+)
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source
Idioms and Phrases with get the nod
get the nod
Receive approval or assent, as in, The contestant got the nod from the judges. Similarlygive the nod means “to show approval or assent.” These expressions allude to the quick inclination of the head to indicate approval.
[ First half of 1900s