Online gaming is playing with, or against people around the world in a computer game of many types or sorts, before I had kids I was a mad gamer, and at times could play for 16 hours a day, it may sound like a waste of time, ant at times it was, but I am don't sleep as it is, so you have to do something to kill the time lol
I only got into bikes really after I had kids, it is more constructive, and obviously more social to, I gave up hard core gaming prob about 4-5 years ago now at a guess
Now instead of gaming I have all you fine people to keep me entertained!