BO2...yay

I actually took a couple days off of work for this game. I love listening to the other teams RAGE when you kill them. I have heard of every insult in the world, I even had a gay literally say "Your mom is a snail and you have a monkey." I kid you not, those were his exact words. I then sent him a message saying "You really went there didn't you on that insult, well your mom is a donkey and you have herpes." I got a message back a day later from that dude and he said "Your stupids fag." So I sent him another message saying "I really did not understand your last message. Are you saying that I has stupid fag?" Please help me understand this. Then he replied two hours later "Doush." I almost fell over from laughing. So I sent him a message back "Do you mean douche?" I have never heard from him since.