expression, ichidan verb
complain; lodge a complaint
Used when someone finds fault and voices dissatisfaction, often about minor things. The phrase implies pointing out a flaw or making an objection.
彼はいつも食事に文句を付ける。
He always complains about the food.
サービスが悪いと客が文句を付けてきた。
The customer complained that the service was bad.