JapaneseTsundokuThe act of leaving a book unread after buying it, typically piled up together with other such unread books.

Definition from [Wiktionary](http://en.wiktionary.org/wiki/%E7%A9%8D%E3%82%93%E8%AA%AD): Etymology 積む (tsumu, to pile up) + 読 (doku, to read), punning on “積んでおく” (tsundeoku, to leave piled up) Noun 積ん読 (hiragana つんどく, romaji tsundoku) 1. (informal) the act of leaving a book unread after buying it, typically piled up together with other such unread books