person with a sharp tongue; acid-tongued person
Refers to someone who habitually speaks in a biting, sarcastic, or harshly critical manner.
彼は毒舌家だから、褒め言葉は期待しないほうがいい。
He has a sharp tongue, so you shouldn't expect any compliments.
あの毒舌家のコメントにはいつも笑ってしまう。
I always end up laughing at that acid-tongued person's comments.
Compound of 毒舌 (sharp tongue) and 家 (person with a certain trait or profession).