fan dance
1. Literally, a striptease or exotic dance employing the use of large fans to conceal, suggest, or slowly reveal the nudity of the performer. While striptease is often relegated in the public imagination to seedy bars and desperate women, the fan dances performed in this club are truly beautiful.
2. By extension, any incremental exposure or divulgence of information, especially that which is tantalizing or of great interest. The filmmaker has been doing something of a fan dance over the past few weeks, offering tiny bits of information about who will be in his upcoming blockbuster.