Drawing/painting a dick/
penis on the roof of something so it can be seen by someone flying over. This word was invented on the CNET podcast "
404". http://www.cnet.com/8301-13952_1-10203032-81.html?part=rss&
tag=feed&subj=Crave
see origin:
http://www.thesun.co.uk/sol/homepage/news/article2336886.ece