To cup ones fart and swiftly manoeuvre the cupped hand to ones nostrils (or the nostrils of another). Useful in deciphering the health of the bowel and the contents of the previous evenings dindins.
Tarquin: 'Bertie dear boy, my olfactory sense deciphers a hint of truffle in your poopascoop. I also note a forthcoming haemorrhoid.'
Bertie: 'Jolly good show, bang on Tarquers!'
'Oh, and please may I borrow your Preparation H?'
To use the shitter of a restaurant, gas station, or store with the intent of only using the bathroom and not buying anything or letting anyone know you will be using the bathroom and only the bathroom.