  CNET GLOSSARY: Terms for the techie
warchalking
The unauthorized act of physically marking the locations of wireless access points (APs) that are available for free network access, such as those at a coffee house or an airport--or an office AP with a leaky signal. The word chalking derives from the informal system of markings used by vagabonds to indicate places where one might get a meal or a place to sleep. See also wardriving. 
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