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.
"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 we get 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
by lily123456 January 25, 2012
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never knowing what is going to come next
Dude 1-damn man my new girl is so spontaneous,i NEVER know what shes going to do in bed:)
Dude 2- you lucky bastard
by sydney w!:) March 17, 2008
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1. arising from internal cause: resulting from internal or natural processes, with no apparent external influence

2. arising from impulse: arising from natural impulse or inclination, rather than from planning or in response to suggestions from others

3. unrestrained: naturally unrestrained or uninhibited

4. botany growing uncultivated: growing without cultivation
John is so spontaneous.
by G.K May 27, 2007
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Bloke 1: "I just did a spontaneous"
Bloke 2: "eww man, in my bed?"
by MaxS June 16, 2008
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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.
"If I could describe myself in one word, it would be spontaneous."
by CoreyF February 14, 2008
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booking tickets for you and your bestfriend to go to paris the day your boyfriend dumps you
my boyfriend dumped me i'm feeling spontaneous
by ladydon October 19, 2011
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Doing something unplanned or unrehearsed
My wife has spontaneously cooked dinner
by Smartgirl100 December 28, 2016
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