From Wiktionary, the free dictionary
From bro + hug.
bro-hug (plural bro-hugs)
- (US slang) A hug shared between male colleagues or friends, especially a quick, physically reserved one. [from 21st c.]
2012, John G. Hartness, Back in Black[1], Bell Bridge Books, →ISBN:It wasn't even one of the one-armed bro-hugs that we usually do, it was a full-on hug with my arms wrapped all the way around his pudgy body.
2013, Dave Sheinin, RG3: The Promise[2], Plume, →ISBN:“I'm proud of you,” Brees whispered in Griffin's ear when they met at midfield after the game for the traditional quarterback bro-hug.
2014, Erin Nicholas, Getting in the Spirit[3], →ISBN:He and Joe did that bro-hug thing that guys did that was not quite a hug but was more than a handshake.