Memory loss caused by the amount of time since you last visited your family. Usually follows a long holiday visit, then an extended absence.
Jane's visit home last year was a real bummer, but now that it's been awhile she is excited to visit. Guess she developed famnesia.
by JG percussion February 16, 2011
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The phenomenon that after eating a big meal you cannot imagine ever being hungry again.
"I know you are going to the grocery store honey, but I dont know what I want for dinner. I just ate lunch and have bad famnesia"
by Snuggs O'Dade May 22, 2008
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The ability to forget about one's family once they are out of your sight
As soon as Tommy got on the train to go back home, famnesia kicked in and he completely forgot all the details of every conversation he had and every family member's face! He felt free
by JoeFish 25 July 6, 2019
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1. It is when you bump into a family member in public and they pretend that they do not know you and vice versa.

2. Or when you have completely forgetten someone is family.
FAMNESIA

1.
Fam's friend: Hey isn't that your cousin?

Fam's cousin: *waves ecstatically*
Fam: *looks cousin in to the very depths of their soul* Nope. Don't know them.

2.
Mother: We are off to visit your uncle (insert name here) in the hospital!
You: ....who the heck is that???
by W0rdPl@y September 13, 2016
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