The term has multiple meanings, depending on the context in which you find it use. For example, in programming, sports, chemistry, physics, or even The Price is Right.
But in the world of social networks, to me it means how many platforms and sites can you keep up with before it's simply too much? I've always referred to "the big 3" of my social networking experience as LinkedIn, Facebook and Twitter, and I even developed a shorthand description for them:
LinkedIn is the business meeting, Facebook is the hallway conversation and Twitter is the cocktail party.
Now, with the advent of Google+ coming online, we potentially have four major social networks to track and interact on. Personally, I've hit the breaking point. I can't keep with with all of them (although admittedly, LinkedIn is the one that I keep dormant most of the time) and remain active on all three. There's got to be a breaking point somewhere. For average people, one social network may do; for others, two is likely the limit.
What's your magic number?
Here's my favorite take on it, from Schoolhouse Rock:
If you'd care to add me to your circles on Google+, I can be found by clicking here.
Image credit: bitzi ☂ ion-bogdan dumitrescu (Flickr)