An exceptionally large penis, this term is used when a man wants to have sex with large breasts. Often used to describe the activities that are about to unfold when communicating with a lady.
Oh heavens Betty. Your breasts are fantastic, and I would love for my Rack Snake to check them out!
When your load settles into a puddle in between her cleavage or on a flat surface of her breast.
(1. )"She told me I could titty fuck her only if after I slurped off the 'Rack Puddle".
(2.)"Oh please let me give you a 'Rack Puddle' I swear if you don't like it we won't do it again".