What's a Staw Poll?

Carol Faires wasn't sure exactly what a staw vote (poll) is, so she searched to find the meaning on the Internet. The is how Wikipedia defines it.

A straw poll or straw vote is a vote with nonbinding results. Straw polls provide important interactive dialogue among movements within large groups, reflecting trends like organization and motivation. In meetings subject to rules of order, impromptu straw polls often are taken to see if there is enough support for an idea to devote more meeting time to it, and (when not a secret ballot) for the attendees to see who is on which side of a question. However, Robert's Rules of Order prohibits straw polls, calling them "meaningless and dilatory." Among political bodies, straw polls often are scheduled for events at which many people interested in the polling question can be expected to vote. Sometimes polls conducted without ordinary voting controls in place (i.e., on an honour system, such as in online polls) are also called "straw polls".

The idiom may allude to a straw (thin plant stalk) held up to see in what direction the wind blows, in this case, the wind of group opinion. Other possible origins include allusion to the insignificance of straw as in "straw man".