rib pontoons 

a big set of breasts

Man, check out the rib pontoons on that slut!

rib pontoons by unkkle buckk September 5, 2006

pontoons

This is a type of womens breast that when acted upon by gravity, they spread far off to the sides...much like women from National Geographic.

"She got the only pontoon titties...they smack against her knees when she is naked and shit."

pontoons by dirt burgler April 5, 2003

magnificent pontoons of love 

large, luscious breasts

She took off her bra and showed me her magnificent pontoons of love!

magnificent pontoons of love by Teratogen June 28, 2011