(nudge bar or roo bar in Australia)
Can anybody tell me what a 'bull bar' is called in Catalan?
A bull bar is a big metal bar which is fitted to the front of vehicles (generally Jeeps and other 4x4s).
http://www.flickr.com/photos/mlbm/109592284/
In the countryside these bars are there to help to prevent wild animals damaging your car in the event of a collision (hence the name 'bull bar' in the US and UK and '(kanga)roo bar' in Australia). In the city, of course, these bars are there (at least as far as I understand it) to help kill small children and little old ladies in the event of a collision and prevent injury to the stupid blonde woman inside who was too busy talking on her mobile phone to look where she was going (apologies in advance to any stupid blonde women who might be on the list and might happen to own an SUV with bull bar).