口くちの端は

expression, noun

gossip; topic of conversation

Used in expressions like 口の端に上る or 口の端にのぼせる, meaning to become the subject of gossip or talk.

• 彼かれの噂うわさが口くちの端はに上のぼっている。

  Rumors about him are on everyone's lips.

• あの事じ件けんはすぐに口くちの端はにのぼった。

  That incident quickly became the talk of the town.

expression, noun

corner of the mouth

Literal meaning referring to the edge or corner of the mouth. Less common than the gossip sense.

• 口くちの端はに食たべ物ものがついている。

  There's food stuck at the corner of your mouth.