A drunk catcher is an area where drunk drivers commonly crash. Usually at the end of long straightaways. Commonly marked by tire skid marks and damage to the guardrails.
A drunk catcher can often refer to the guardrails themselves.
Very common in rural areas.

An obstacle found in one's path that, while drunk, provides an incredible challenge to avoid. This includes cracks in the sidewalk, low-hanging tree branches, abnormal curbs, and members of the opposite sex who are of questionable attractiveness. Generally, these are ranked by class, or degree of difficulty: class 1 being the lowest and class 5 being the highest.