ブラウザの設定でJava Scriptの使用を有効にしてご利用ください。
出典:Wiktionary
First recorded 1880, and originally mash letter, from mash, masher, likely from Romani masha (“a fascinator, an enticer”), mashdva (“fascination, enticement”), + note. See mash for details.
mash note (複数形 mash notes)
mash note