liquid tits 

Very large, natural breasts that have a definite fluid motion when bouncing, especially during intercourse.

Once those liquid tits started undulating, I knew foreplay was over and the bomb-run was imminent.

liquid tits by udm123 July 5, 2010

Liquid tits 

The smoothest thing known in human existence. Nothing rivals it's unequaled smoothness. It's main usage is to connote something supremely awesome by inferring that said awesome thing is even smoother.

"Holy balls, that guitar is smoother than liquid tits!"

"Dude . . . this pizza is smoother than liquid tits."

Liquid tits by Smeg Thooney March 25, 2011