“传小纸条”的“小纸条”用英语怎么说

passing a note around.

a slip of paper

The boy secretly gave the girl a slip of paper with a telephone number on it.

http://www.thefreedictionary.com/slip+of+paper

Chinaren里面用 "Send Message"，觉得能用。

Send a piece of message

小纸条：past a little message