It's looks a lot like a dolly (the kind of dolly you use for moving heavy boxes), but with larger wheels. Segways are motorized, designed to transport people in a manner that's safer and more environmentally-friendly than that of cars.

Not to be confused with a segue, of the same pronounciation, which is a transition between two consecutive ideas in a speech or conversation.
"I guess I thought about trying a Segway, but bicycles are so much cheaper."
by MoxyFox December 22, 2006
Possibly the gayest form of transport ever to be invented right up there with roller blading.
Jack: "Hey buddy, whats the hardest thing about riding a segway?"
Craig: "i dunno man"
Jack "Telling your parents you're gay!"
by Wildboys NZ December 21, 2008
A product that created demand through hype before there was even supply and tricked a bunch of rich dumbasses to buy it, eventhough it's completely worthless.
Maddox completely owned the Segway.
by Brad October 21, 2003
A segway is fun to ride but you wouldn't want your friends seeing you riding it.
This same concept can be applied to a girl, she may be fun to ride but you don't want your friends to see you riding that.
Timmy "Hey Steve who were you waving at?"
Steve " Oh that's just my segway, don't worry about her"
by A stray mexican October 14, 2015
(verb) to smoke copious amounts of marijuana
"Dude, what are you up to tonight?"
"I'm going to Segway with Bill tonight, want to join?"
"Of course man, you know I'm always down to Segway!"
by SegwayAllDayErryDay February 23, 2012
Useless piece of garbage that you would probably get beat up/shot if you were seen in public using it.
The victim was attacked because he was riding a segway.
by Jimmy S January 11, 2004
A useless scooter with 2 wheels, thought to be the greatest idea of the century. However, the Segway would not be as impressive if a small wheel was added to the front.
A young girl in California was mugged on the sidewalk by a man riding a segway
by theskiesbled April 2, 2004