The completely non-verbal communication between bros, in which conversations regarding former conquests, or the availability/need for a wingman take place. Typically happens near instantaneously and if adeptly performed, any females nearby will have no idea it happened.
Steve: Hey Todd what's up? Who's your friend?
Todd: *Stare* *Nod* (Examples of Bropathic Communication)
Steve: Hey, did you know that Todd is an astronaut for NASA? And is working on the cure for AIDS?