Have you ever seen mammatus clouds, Gentle Reader? Well, here's a shot of some, from that Wiki link:
But... there are more, and MUCH better, photos here...which is THE reason for this post. I'd have posted one of those pics, but the images are clearly copyrighted, much to my dismay. So you gotta chase the link. It's oh-so-worth your time to do just that. I had a hard time believing the images weren't photo-shopped. Amazing.
And... I think the clouds are aptly-yclept. Coz they look like huge celestial mammary glands. Thus spake The Dirty Ol' Man, reverently.