P.T.A.R.T.
PTART is like a middle finger from a taxi driver to Uber and Lyft. It means they're ready to fight for their money.
"PTART! I'll take your customers and your job!", A taxi driver who saw an Uber driver park right in front of his taxi.
"PTART! I'm gonna take your app and break it!", A taxi owner seeing a Lyft driver take all the passengers from his taxi lot.
"PTART! I'm gonna yell it at you until you're deaf!", A taxi driver who just saw a Uber driver park in front of his taxi again."