bluejacking

noun
  1. the practice of using one Bluetooth-enabled mobile phone to gain access to another, esp in order to send anonymous text messages

Word Origin for bluejacking

C21: from Blue (tooth) + (high) jacking
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012