Shampubes 

When you wash your hair (with shampoo) and the shampoo has gone down your body and gathered up in your pubic hair. Sometimes you will notice when you have gotten out of the shower, meaning you have to get back in to rinse your pubes.

(from outside the bathroom)
"Why've you turned the shower back on?"

(from inside the bathroom)
"I got out and looked down- turned out I had shampubes."

Shampubes by Ten Inch Stew February 21, 2014

Shampubing 

1.) During the act of applying shampoo to one's head, one finds that an excessive amount of product has been used and therefore applies the remaining shampoo to the pubic area

Person 1: I swear I run out of shampoo way too quickly. I think I use too much at a time.
Person 2: Then you really need to start shampubing. At least get your money's worth.

Shampubing by Jackie Schmidt December 4, 2011