Gob-Wash
The act of drinking from a vessel but returning some or all of the liquid back into the vessel.
"HEY! don't Gob Wash it you filthy chav, how can we have some NOW."
"When you go up for communion, make sure that ***** is behind you, I reckon he Gob-Washes the chalice."
"When you go up for communion, make sure that ***** is behind you, I reckon he Gob-Washes the chalice."