Origin of yawner
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for yawner
Some were busy at arithmetic, while, every moment, whack went the rod upon the crown of the idler or yawner.
If he attempts to take some of our big banked bullfinches in his stride, with a yawner on each side, will get into grief.'Mr. Sponge's Sporting Tour
R. S. Surtees
Word Origin and History for yawner
1680s, agent noun from yawn (v.). Meaning "boring thing" is 1942, American English colloquial (yawn in this sense is attested from 1889).
Online Etymology Dictionary, © 2010 Douglas Harper