piercer
/ˈpɪəsə(r)/noun
1- a person or thing that pierces something钻孔工, 冲床操作工; 钻孔机, 锥子, 冲床, 冲压机。
1.1
- often with modifier a person who pierces the ears, nose, or other parts of the body so jewellery can be worn in them（为了能戴上首饰而在耳朵、鼻子或身体其他部位）穿孔的人。