To be very close friends who share secrets.
とても仲の良い友達で、秘密を共有すること。 (totemo naka no yoi tomodachi de himitsu o kyo yu suru koto)
"Lisa and Nora are as thick as thieves since childhood."
"リサとノラは子供の頃からとても仲の良い友達です。" (risa to nora wa kodomo no koro kara totemo naka no yoi tomodachi desu)
to expose wrongdoing or reveal secret information
to make unrealistic plans or dreams
to explain something in a very clear and concise way
to feel slightly ill
a person who spends a lot of time sitting and watching TV
the basic practical details of something
