A sexual position involving three parties incorporating two parties on either end with one in the middle. On one end, one party penetrates the middle party while holding the legs of them as the 'bridge'. On the other side, the 'bridge' party delivers oral to the third party who is supporting her by the shoulders. The draw bridge comes into full effect through the motion on the first party lifting the middles body up and away from the oral recipient and back down offering erotic cuckhold opportunities.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.