A combination of the words bro and tank. It is a tank top worn by males that shows of the muscles they have.
Bro #1: Hey bro, nice tank! Have you been working out?

Bro #2: Its called a brank and yes I have bro! Thanks for checking my body and my clothes out!
by Abro2010 June 26, 2011
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When somebody uses a melee attack with a weapon in the game "Halo", or "Halo 2", for the Xbox.
"Stay there, and I'll brank you with this rocket launcher."
by Pomato September 17, 2006
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When you wank so hard that your dick breaks in half.
Bro, last night i went at it for so long that my dick is brank
by Hacefully December 16, 2019
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Someone who thinks that they are good at tech
by Murphster11111 September 14, 2023
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