Definition
To drive through residential streets to avoid congestion on the main roads.
Also Said As
- divebomb
How People Actually Use It
Using small residential side streets during a commute, resembling the route a rat would take in a maze. Growing in use since the invention of Waze and other commuting apps.
"Dave's commute had become awful due to the new development, so he decided to rat run, saving a few minutes off his drive."
Source: Urban Dictionary