n.
- a liquid preparation for washing the hair.
▸a similar substance for cleaning a carpet, car, etc.
- an act of washing with shampoo.
v.
(shampoos, shampooing, shampooed)
wash or clean with shampoo.
Etymology
C18 (in the sense ‘massage’): from Hindi cāṃpo! ‘press!’, imper. of cāṃpnā.