blackstever's definitions
when two friends know that they have slept with the same chick and refuse to admit it to eachother because she was really ugly, a total skank or lame in bed
i was having a drink at the bar with my best friend when a horribly familiar voice behind us shouted "hello boys!". One look at my friends face and I knew we were Mongolian brothers.
by blackstever December 19, 2012
Get the Mongolian brothersmug.