v. the act of squirting a travel-size bottle portion of shampoo up one's anus, and then proceeding to bend over a willful and participating
lover's
head, from which the carrier of shampoo releases it on their
head, giving them a thorough and affectionate cleaning.
When I got back from my trip, I was dead-tired and just wanted
Melissa to give me a good shampooping; she refused of course, that
fucking prude!