Otherwise known as rock, paper, scissors. I did a quick search and only came up with an alternate version of the game where the contestants kick each other in the nut’s until all but one cries uncle. I guess only guys played 
I was thinking possibly ro=rock, etc. in some vernacular. Anyone know the real deal?
Don’t know why the game got the name, but the real name is spelled “Rochambeau,” and is named after a French General who lived around the Revolutionary War time.