expression, ichidan verb
get a body piercing
Used for getting a piercing on any body part, not just earlobes. The verb 開ける means 'to open a hole'.
来週、耳にピアスを開けるつもりです。
I'm planning to get my ear pierced next week.
舌にピアスを開けるのは痛そうだ。
Getting a tongue piercing looks painful.
Combination of ピアス (piercing, from English 'pierce') + を + 開ける (to open a hole).