Pakistani slang for a cop. Tulla's are corrupt, overweight and waste no opportunity to exhort bribe from drivers. But you can't really blame them because they aren't payed very well and usually have 5 kids to feed at home. They stay away from flashy rich drivers.
That poor bastard we just raced got pulled over by some tullas, he's probably gonna lose his gas money too.
a traffic policeman or any corrupt policeman who extorts money from people
The truckers have paid off the tulla that stands at this intersection, he lets them get away with everything.