A song or piece of music, that or may not have been created with the specific intention to inspire women to the dance floor, evoking gyrations and sways which in turn cause a woman's strategically exposed cleavage to jiggle.
Cute girl: "Oh...my...gawd, this is my jam! It's a total titty jiggler! Let's hit the dance floor!!!"
Fat friend: "Um...you go ahead, my feet hurt..."
an event that is so astronomically awesome that one's titties actually move on their own
that party last night was a titty jiggler man