sham·poo 
(shăm-p)
(shăm-p)n. pl. sham·poos
1. Any of various liquid or cream preparations of soap or detergent used to wash the hair and scalp.
2. Any of various cleaning agents for rugs, upholstery, or cars.
3. The act or process of washing or cleaning with shampoo.
tr. & intr.v. sham·pooed, sham·poo·ing, sham·poos
To wash or undergo washing with shampoo.
[From Hindi cāṁpō, imperative of cāṁpnā, to press, knead, shampoo; akin to Prakrit caṃpaï akin to cappaï, he presses; see CHAPATI.]
sham·pooer n.