La meme de perfection, mais perdue

Is there a word, an online friend queried, for that experience of knowing the perfect meme to fit an occasion, but being unable to find it? There is now. In the vein of the word "riposte," in the spirit of "es·prit de l'es·ca·lier" (a repartee thought of too late, on the way home), we bring you "la meme de perfection, mais perdue": that moment when you know the meme you want...you just can't find the meme you want. This sentence is intended to be used as an exclamation, for emphasis.