The british way of what most Americans will call a "highway".
In around 100 kilometers we will go on the multiway.
When two people go through many different mediums of communication (e.g., texting, IMing, facebook) to talk to each other. This phenomenon tends to happen a lot in this world where we have so much technology and social networking sites available to us.
"I had this guy leave me a voicemail at work, so I called him at home, and then he emailed me to my BlackBerry, and so I texted to his cell, and now you just have to go around checking all these different portals just to get rejected by seven different technologies"
"I texted my friend so she emailed me back so I facebooked her and she tweeted me so I IMed her and then she called me. Multiway messaging FTW."