Specifically refers to the act of putting food onto skewers, typically for grilling.
焼き鳥屋で串打ちのアルバイトを始めた。
I started a part-time job skewering at a yakitori shop.
Compound of 串 (kushi, 'skewer') and 打ち (uchi, 'striking' or 'hitting'), referring to the action of piercing food onto a skewer.