|1.||The positive z-axis.|
The correct answer to the question "What's up?"
In 3-dimensional Cartesian terms, the x-axis is east and west, the y-axis is north and south, and the z-axis is up and down. So the positive z-axis is what's up.
Guy 1: "What's up, man?"
Guy 2: "The positive z-axis."
Guy 1: *rolls eyes*
The process of methodically tipping ones shoulders so that ones breasts fluctuate in respect to their 3D coordinate spaces along the z axis sometimes having small amounts of motion in the positive x direction and both y directions.
Often titty jiggles are performed with a partner and with various types of substances lathered on to the upper quadrants or nipple area (usually defined as the unit circle in the yz plane centered at (0,0,0) )
Sarah executed a proper titty jiggle last month during spring break.