whistle tits 

A loose term meaning a woman's tits are so saggy if she did circles with tassels on they would whistle...

Lookin at a woman guys say now there's a whistle tits

whistle tits by trterrell March 4, 2012

All tits and no whistles 

When someone looks hot but has no brains.

Look at that girl she’s all tits and no whistles

All tits and no whistles by Madcow81 October 18, 2020