Typically encountered in college dormitories, a shower in which bros assume separate shower stalls and engage socially during said shower. The semi-anonymous nature of the Bro shower provides the opportunity to often times engage in impromptu singing, or conversations about otherwise taboo topics. The bro shower can either be circumstantial or initiated.
"Bro, this is a great conversation, but i gotta go take a shower, wanna come with for some bro shower action?"
*Bros singing Taylor Swift in terrible falsetto voices. "That's such a good song bro, I don't know who you are, but this is a great bro shower."