Top Definition
A period of heavy relaxation which a person enters after school is finished. The word originates from a combination of three words, Yelena, the word’s creator, summer, where most yummernations occur, and Hibernation, a synonym for emphasized rest. During a yummernation, a person tends to hide in their room with an abundance of fast-food, a TV remote, and a bathroom nearby.
Bro… what are you doing tomorrow night?!
*Automated text message *
Sorry, I am in a yummernation. Will, hopefully, return to you before August.
by YummernationFTW. January 15, 2011

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