口くちが減へらない

expression, noun-modifying (irregular)

fast-talking; never at a loss for words; always ready with a retort

Describes a person who talks back readily, argues persistently, or always has a quick reply; often carries a negative or critical tone. The expression is fixed and used prenominally, as in 口が減らない人 or 口が減らないやつ.

See also: 口の減らない

• 彼かれは口くちが減へらないやつで、いつも言いい訳わけばかりしている。

  He's a fast-talking guy who always has an excuse ready.

• 口くちが減へらない人ひとと議ぎ論ろんしてもきりがない。

  Arguing with someone who never runs out of words gets you nowhere.