Area of road, usually where speed limit drops, where multiple or one determined cop sit majority of the daybusting unsuspecting speeders with radar to get money for the department.
An area of road where you want to faster then the posted speed limit. Cops typically patrol these areas and when you do follow the speed limit you are most likely going to get tail gated.
I got a ticket in that speedtrap because I was going 40 even though the speed limit is 25.