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1.
to place your hand on someone's titties and jiggle them around.
Man brotha, i totally did a titty jiggle to your mom yesterday.
by Max Freeman December 30, 2006
 
2.
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.
by Let G be a February 13, 2012