Definition
The tan line left by clothing, especially by a short-sleeved shirt.
See Also
- truck driver's tan
How People Actually Use It
A tan where the tan lines are obviously caused by wearing normal clothes outside in the sun for long periods of time, instead of wearing swimwear or more suitable clothes for tanning.
"Dude, your chest is so pale compared to your arms. And why are your knees so red? Get rid of that farmer's tan before you come to the beach again, it looks ridiculous!"
Source: Urban Dictionary