Meaning

• To wash one's own hair with shampoo.

  "My neat-freak of a friend has been compulsively shampooing for every bath he has taken."

• To wash (i.e. the hair, carpet, etc.) with shampoo.

• To press or knead the whole surface of the body of (a person), and at the same time to stretch the limbs and joints, in connection with the hot bath.

Meaning

• The act of cleaning something with shampoo.

  "The foyer carpet needed regular shampooings."