boob bridge 

The stretched material of a women’s shirt between her large breasts. If the breasts are large enough and the shirt tight enough it creates a fabric bridge from one boob to the other.

Dude I used to love watching Friends Jennifer Anniston had the best boob bridge.

boob bridge by gcribb January 3, 2006

Boobridge 

The stretch of material between a hefty chest.

Damn, that girl's boobridge is about to break.

Boobridge by Jon The Mod April 16, 2003