1. The obnoxious sound of someone talking far too loudly on a cell phone in public, without regard for those around him.
2. A person who speaks loudly on a mobile phone, hoping that those around him will be impressed.
2. A particularly harsh or inappropriate ringtone that is set at a volume level so high it can be heard across a busy street. Perhaps used to draw attention to the phone's owner, who likely doesn't get any otherwise.
The cacophonie coming from the guy on the phone at the next table became so irritating that I had to ask the waiter to move our party across the restaurant.