expression, godan verb (-ru)
become a topic of conversation; be talked about
Used when someone or something becomes the subject of gossip, rumors, or widespread discussion. Often carries a nuance of being made much of or being the center of attention.
彼の奇妙な行動が口に乗って、町中の噂になった。
His strange behavior became a topic of conversation and turned into a rumor all over town.
That incident is still being talked about by people.
expression, godan verb (-ru)
Rare usage meaning to be tricked or fooled by someone's words. More commonly expressed with 騙される or 口車に乗る.
彼の甘い言葉に口に乗って、大金を失った。
I was taken in by his sweet words and lost a large sum of money.