noun
plural -poos
[count, noncount]
a special liquid that is used for cleaning your hair
a special liquid used for cleaning rugs, carpets, etc.
[count] :an act of cleaning hair, a carpet, etc., with shampoo - usually singular
verb
-poos; -pooed; -pooing
[+ obj] :to clean (something, such as hair, a carpet, etc.) with shampoo
US