(verb) the act of slapping your forehead in shock upon receipt a $5000 mobile broadband bill when you thought you had signed an unlimited use contract
An Oklahoma woman who bill slapped herself so hard that she had to visit her local emergency room, has filed a lawsuit against AT&T (NYSE: T) and RadioShack (NYSE: RSH) after she purchasing a netbook with a 3G data plan and receiving a $5,000 bill for exceeding her monthly data cap.

http://www.informationweek.com/news/telecom/business/showArticle.jhtml?articleID=215600328&subSection=News
by GeorgeDawes March 12, 2009
Get the bill slap mug.