ツーと言いえばカー

expression

quick to take a hint; very responsive; quick on the uptake

Describes a relationship or person where a brief cue (like 'tsu') immediately gets the right response ('ka'). Often used for close friends or smooth teamwork.

See also: ツーカー

• あの二人ふたりはツーと言いえばカーの仲なかだ。

  Those two are so in sync that a single word gets an instant understanding.

• 彼かれはツーと言いえばカーで、説せつ明めいがほとんどいらない。

  He's so quick on the uptake that he barely needs any explanation.