look up any word, like ethered:
 
1.
The time immediately following Thanksgiving during which a debilitating sense of regret overwhelms a person, either due to eating too much food or, the more common problem of not eating all of the food that a person had hoped to eat.
"I know Regretsgiving has started when I realize that there is no more pumpkin pie and I never had a chance to devour a piece."
by Emmahasregrets November 30, 2009