noun, noun or participle which takes 'suru'
operating a cash register; cashiering
Common in part-time job contexts; refers to the task of scanning items and handling payments at a register.
バイトでレジ打ちを覚えた。
I learned how to operate the cash register at my part-time job.
レジ打ちのスピードが上がってきた。
My cashiering speed has improved.
Compound of レジ (from English 'register') and 打ち (the noun form of 打つ 'to strike', here referring to keying in items).