1 definition by sammy_Q
A gay pride slogan associated with male on male anal sex. Comes from the saying Blood Brothers however instead of sharing each others blood they share each others 'mud' or shit.
Example #1
Joe: See those two guys, last night they became mud brothers!
Example #2
Ben: I'm a mud brother from way back.
Joe: See those two guys, last night they became mud brothers!
Example #2
Ben: I'm a mud brother from way back.
by sammy_Q April 13, 2010