Your own gown is most delicately suitable, both to the occasion and to yourself,' to be translated: Your gown is insipid and entirely forgettable. If you wear it on every other occasion this entire season, no one will notice or care.
Prerequisite for rereadability in books: that they be forgettable.
I am a forgettable leaf on a tree.
Slightly forgettable movies can sometimes make great musicals.
Carnal knowledge is as forgettable as the other kinds.
On a single day, I read articles where I was described as being alternately 'lanky,' 'pudgy,' 'doughy,' 'balding,' 'utterly forgettable,' and 'constantly irritating.