鼠そ窃せつそせつMeanings1nounsneak-thiefRare literary term for a petty thief who steals by sneaking around, like a mouse. Not used in everyday speech; modern Japanese would use こそ泥 or 空き巣.古ふるい小しょう説せつに「鼠そ窃せつ」という言こと葉ばが出でてきた。The word 鼠窃 appeared in an old novel.