Chinese sayings on friends and frenemies
割席 Gē xí. Literal: cut the seat (or woven mat). Meaning: Break up with someone
心照 Xīn zhào. Literal: Heart shine. Meaning: Understanding someone really well
糖黐豆 Táng chī dòu. Literal: Sugar sticky beans. Meaning: Inseparable friends
人前人后兩个樣 Rénqián rén hòu liǎng gè yàng. Literal: People front, people back, two faces. Meaning: Two faced.
Some local Hong Kong slang, used also in Mandarin. For a bit of a change of pace.