Green’s Dictionary of Slang

1. champagne.

1999		Indep. Rev. 10 July 20: ‘Time for a spot of ’poo,’ bellowed a rosy-cheeked scion of the gentry.
2000		Observer Screen 5 Mar. 7: Neil and Christine are an item, and have been through vintage poo and total humiliation.

2. hair shampoo.

2011

Times Mag. 30 Apr. 31/2: According to the ‘no-poo’ devotees [...] washing strips the hair of its natural oils secreted by our scalps.