1v1 is used as a term in games, sports, and any other competitive activity as a 1 player versus another player in a respectful or disrespectful manner. 1v1 can be used if someone wants to test their skills against a better player. Some people say its kids proving they are better than others but it doesn't always mean that they are like 45 don't know shit.
Hey NAME want to do a 1v1? Im getting better at this game
NAME: Sure lets see how you do.