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1.
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
 
2.
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