Today's word is Agelast.
There is a lot of humor in the world along with a whole bunch of curmudgeons. When you pull out the thesaurus to find another word for such a person, agelast is a good substitute.
The Illustrated Compendium of Weirdly Specific Words is fun and entertaining so I want to share. Tyler has a great sense of humor and I asked if I can record a Word of the Day post to help brighten everyone's day. I also think you should get a copy of the book.