- an eccentric, strange, or foolish person.
- an insane person.
Origin of kook
First recorded in 1955–60; perhaps alteration of cuckoo
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for kook
Paul watched his father marginalized and mocked as he was trapped by the GOP establishment determination that he was a kook.Rand Paul Controls the Wacko Bird Flight
September 29, 2013
One sure sign Gov. Jindal is hungry for higher office is his willingness to sup at the table of the kook right.
But Paul Begala says to really make it in politics, he has to break with the kook right.
- US and Canadian informal an eccentric, crazy, or foolish person
C20: probably from cuckoo
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
Word Origin and History for kook
1960, American English slang; see kooky.
Online Etymology Dictionary, © 2010 Douglas Harper