Sport originally derived from sport climbing, consisting in short sequences of "moves" (movements of the arms allowing the body to be moved up a climbing wall, a rock boulder or even a house wall) that requires huge levels of strenght on the forearms & fingers, and different special tecniques. This sequence is normally called a "problem". The climber is not roped, and the only protection allowed is a thick foam mattress called "crashpad". Bouldering problems rarely go higher than 3 or 4 meters above the ground.

"Solving" a problems often forces to make unlikely movements, like "pinching" a hold with your heels, or literally jumping from hold to hold (doing a "dyno"). Style is important, but what really counts is to reach the last hold (the "top")

Bouldering was developed in the 60's in France and in California (by John Gill, the "human fly") as a pastime for bored rock climbers in off-season. In the 90's, however, the growth of indoor climbing walls (often homemade) and rock climbing gyms has made bouldering popular with the urban / hip-hop crowd, transforming it - in France and UK - in a "signature" sport like skateboarding. Part of the popularity of bouldering is due to the fact that it's being quite cheap - the only thing you need is a pair of climbing shoes (and the crashpad if you're bouldering outdoor).

There's a lively competition circuit around the world, and there are now bouldering sites (often simple concrete walls) almost in every city of the world. In fact, bouldering is now more a urban sport than an outdoor activity.
by Korman643 July 31, 2005
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being so high your past the state of being stoned
"Dude how high were you?"
"Man, I was bouldered. It was awesome"
by wowwyouwould March 11, 2012
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The act of one man bashing his testicles against the testicles of another man, sometimes for comedic purposes, but most often for sexual gratification.
Dude... I was totally bouldering with Jared last night and it was WAY hot, but now my ballbag is all bruised.
by zombieman March 28, 2018
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a very large pair of breasts that look like boulders
Man ... Look at those boulders in that t-shirt
by clown1201 February 15, 2010
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A type of Rock Climbing that started when a group of drunk guys camping bet each other they couldn't get on top of a boulder.
Jerry: Damn it John! You kicked the hackey sack on top of that boulder!... I bet you can't get it.

John: I bet you I can!

...and Bouldering was born.
by Dirt Bag Dude February 9, 2013
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The only city in the whole USA, where you'll find tailgaters grilling tofu and veggie meat instead of ribs, burgers, hotdogs, steak, etc
Boulder guy to his denver friend: hey man what do you say we go tailgate at the game today

Denver friend: cool i got to go to the store and pick up the meat

Boulder guy: wtf??!!
by Mannnyo October 17, 2006
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