"Olden times (greek/uncle?) when men would go into battle and would be like: We're sword brothers!!! So they would just fuck and bond cause they're sword brothers."
by TotallyTay727 October 18, 2016
Sword Brothers are two males who have touched the tips of their penises together, thus sealing the bond of "Sword Brother"
by TheRealTycho April 06, 2017