What does it mean to give a red envelope and order takeout?

You give me a red envelope and order takeout is an online buzzword, which is usually used to describe the interaction between friends. It means that a friend gives a red envelope to another friend under certain circumstances, and in return, the friend who is given a red envelope will order takeout for the other party. This behavior expresses feelings of friendship, mutual help and sharing. In fact, this is just a humorous remark, and there is no actual obligation or requirement.