expression, ichidan verb
get one's story straight; coordinate what to say
Used when people agree on a version of events beforehand so their accounts match. Often implies a deliberate effort to avoid contradictions, sometimes with a negative connotation of collusion.
See also: 口裏を合わせる
警察に話す前に、みんなで口を合わせた。
Before talking to the police, they all got their stories straight.
彼らは口を合わせて同じ嘘をついた。
They coordinated their stories and told the same lie.