借かりっぱなし

noun

borrowing without returning; keeping something borrowed

Describes the state of having borrowed something and not yet returned it, often with a nuance of neglect or irresponsibility. Commonly used with 〜にする or 〜だ.

• 彼かれに貸かした本ほんを借かりっぱなしにされている。

  He borrowed a book from me and hasn't returned it.

• 借かりっぱなしはよくないよ。

  It's not good to keep things you've borrowed without returning them.