Wiktionary
forgettery
n. (context humorous English) A poor memory that is inclined to forget things.
Usage examples of "forgettery".
Impala, sealed together in copper cylinders, consigned to the great forgettery in Mount Holyoke Mausoleum.
Harmon Lang-ley, having come to the end of a long and unspectacular career, poised, so to speak, on the edge of the great forgettery, would not be the one, reasoned Mack, to shun the mantle of sudden fame this baby offered.