Definitions by Urban Anon

Sandblasting 

When you have dry, raw, lubrication-less sex until you are raw and in pain.

Also

Having rawness or redness on your skin due to the friction of shaven stubble on your partner's pubic hairs during sex.

"Mark was sandblasting Zen until he was chaffed, red, couldn't walk and he couldn't feel his insides (or outsides)."

Sandblasting by Urban Anon April 15, 2010