Taking a risk, living life to the fullest, no plans, "don't think just do". To be spontaneous is to be the most relaxed go with the flow and have fun person, you would never get mad if plans changed you would get excited because than it would become spontaneous.
Example: "Hey what do you guys wanna do tonight?"-dana
"We had those plans to go see the 11 o'clock move"-Celeste
"Why don't weget in the car and just drive and see where we end up going or what we think of."-cassidy
"Let's go it will be a spontaneous adventure,forget the movies."-dana
To do something on a whim. Most of the time, it's living life in the fast lane, without regret. Sometimes you wake up the next day and wonder why you effin' did that?
Example: Person #1: Let's be spontaneous and go to Alaska. We can build an igloo with our bare hands!
Person #2: Yeah, sounds fun! We can even sleep in it naked without a fireplace!
Overheard person: Are you serious? You'll get frostbite on your penis and it will fall off.
or
Person #1: Hey, I'm bored! Let's go skydiving today!
Used by girls on popular dating sites to make them seem more interesting than they really are. Spontaneous is synonymous with uncreative and unoriginal. Spontaneous people don't like to plan, because it requires too much thinking. They like getting lost while driving, because they're usually not the ones driving, they don't have things to do when they get home, and talking about scenery is a good distraction from talk about who they really are.
Example: "If I could describe myself in oneword, it would be spontaneous."