Expectorating is polite term for spitting something out. It is not uncommon for cuppers to be required to taste over 100 samples per day. This level of exposure to caffeine makes its essential that cuppers make their evaluations without swallowing the liquid. You will usually see cuppers sampling coffee using a spitoon. It is considered poor etiquette to put your spitoon on the cupping table during or after a cupping, so be sure to dispose of any spent coffee liquid in an appropriate and hygienic manner.
Fortunately our physiology makes it easy to experience the full flavour sensation of a coffee without swallowing it. Heath explains that due to the non-equilibrium volatilisation that occurs after slurping,