プログレッシブ和英中辞典(第4版)の解説
かきすてる【書き捨てる】
❶〔書いて捨てる〕
恋人あての手紙を書き捨てた
He threw away the letter he had written his girlfriend.
❷〔書いたままほうっておく〕write ((a letter)) and leave it lying (on one's desk);〔途中まで書いて〕start writing ((a letter)) but give up in the middle
❸〔なげやりに書く〕write carelessly [sloppily]
メモ帳にだれかの住所が書き捨ててあった
I found somebody's address scribbled on a memo pad.