A Shitty Limo, usually the poor quality can be attributed to a destinct lack of stretch, a patchy paint job or that it is simply a people carrier with an extra wedge stuck on the back.
Dave: wooah, check out that limo, thats hot
*limo turns the corner*
Bob: No man, that shimo doesn't belong on the road it belongs in the trash, just like your mom.
The Police. If they are posted in an area then they are "Patrol".
"I'll break the door, you check for patrol"