The act of throwing each leg over the corresponding wall of a public restroom stall and defecating. This is a variation on the always popular Spidey Dump or Monkey Dump, but a higher elevation is reached.
Dude, I went to church on Sunday and totally was basejumping during Communion.
by Kyle Barry October 24, 2005
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BASE jumping literaly stands for Building, Antenna, Span (bridge), Earth (cliff).

When skydiving isnt quite enough what do you do, base jump. Jumping from a fixed object. It is the craziest fucking shit ever. Basicaly you find a building or anything thats about 400ft and up, and jump off pulling your chute only seconds from the ground. If your reall skilled you do some flips and spins on the way down. There a some hot spots around the world like New River Gorge Bridge (USA), Petronas Towers (Kuala Lumpur, Malaysia), and many more.

BASE jumping is sick
by $kYd!v3r October 01, 2005
BASE is an acronym that stands for; Building, Antenna, Span (ex. a bridge), Elevation (ex. a cliff). To become a "base jumper", participants in this extreme sport are required to parachute from at least one of each of the four structures/elevations that make up it's name.
Pro snowboarder, Jim Rippey can be seen performing a base jump from an antenna in the movie, TB8.
by Jonny|B June 28, 2005
BASE jumping, also sometimes written as base jumping or basejumping, is an activity that employs a parachute (or a wingsuit and parachute) to jump from fixed objects, with the parachute unopened at the time of the jump. "BASE" is an acronym that stands for the four categories of fixed objects from which one can jump:

* Building
* Antenna
* Span
* Earth
If your parachute is open when you jump, it's not basejumping - that's paragliding.
by thr33phas3 August 27, 2009
Committing suicide with a backpack on.
Oh, how'd he die? He went base jumping off of the bridge.
by motorboat 'em April 07, 2014
The sport that only very cool or stupid people do that involves running and then jumping of the side of a cliff or object. After having a wild fall downwards the person pulls their parachute hoping that it opens. If not they die.
<some boy> hey girl did you see steve on the news?
<some girl>no, what happened?
<some boy> he went to argentina and died base jumping
<some girl>ahh, i told him to zig when he thought he should zag
by That Damn Sheep June 17, 2005
when your stupid enough to jump off a building. Simple enough
Why the hell would you jump off a building
by NateK July 10, 2005
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