The tan a bro gets after wearing a tank top/bro tank in the sun for an extended period of time. The best 'bro tan' will make a bro look like he is wearing a light tank top with nipples when he is, in fact, shirtless.
"The chicks digged my bro tank so I wore it all Coachella, now I have an epic bro tan!"
then tan you get on your feet for broing out too much and wearing flipflops everywhere you go.
bro1: wanna bro out tomorrow?
bro2: i need to go to the beach to work on my bro tan.
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