Campaign to raise awareness of testicular cancer. Thought to be first used in the US by Testicular Cancer Awareness Network before gaining popularity in Europe. ROCK the SOCK, Sock on a Cock, Cock in a Sock and many others used this in a movement to raise money and awareness of testicular cancer.

rock in socks are breasts that have lost the ability to hold themselves up. these breasts give the appearance that they are nothing more than a rock placed inside a tube sock hanging from one's chest

Snorting cocaine and then getting fucked

The horrible effects of gravity on a woman's breasts resembling tube socks filled with rocks.

Used to describe saggy breasts.

Totally Awesome, Best Thing Ever, Turns Me On, Makes Me Tremendously Happy, Overly Excited Response To Good News

it means- your cool your awesome it's cool or awesome