ホッチキス芯しんalso: ホチキスしんMeanings1nounstaple (for a stapler)Refers specifically to the metal staples used in a stapler (ホッチキス).See also: 芯ホッチキス芯しんが切きれたので、新あたらしいのを買かわないと。I ran out of staples, so I need to buy new ones.