Refers to a person who uses clever but misleading arguments; often carries a negative connotation of being a quibbler or logic-chopper.
He is known as a sophist and always talks down his opponents in debates.
Compound of 詭弁 (sophistry, fallacious argument) and 家 (person, specialist). The exact historical derivation is uncertain, but the word follows a common pattern for labeling a practitioner of a particular skill or trait.