boy racer

noun

informal
  1. a young man who drives his car aggressively and at inappropriately high speeds
  2. (as modifier)the boy-racer market

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