you

you and yours

you together with your family and close friends

你和你的一切（包括你的家人和密友）

you-know-who (或 you-know-what)

used to refer to someone (or something) known to the hearer without specifying their identity

那个人（或东西）（指不待明言便知所指是谁或什么东西）

the minister was later to be sacked by you-know-who.

部长后来被那个人解雇了，你知道他是谁。