To modify your street car with go-fast race parts or other setups which hold little
to no value to the driver, but is good
for posing. This is especially popular in the BMW E30 community. Similar
to rice, except
trying to look like a track
rat instead of a street racer.
btw, it can be used sarcastically by people who are actually
upgrading their stuff for good
reasons in jest towards the people who do it solely for looks.