|We've all been there...|
Rotgut is the catch all term for any cheap, low quality alcohol. The constitution saving throw DC for Rotgut is 10. However, unlike most weak alcohols a person failing their saving throw is drunk until they take a long rest. After finishing the rest, they must make another constitution saving throw (again at DC 10) to avoid being hung over (suffering from the poisoned condition). This condition lasts until the character takes a short rest. The main appeal of rotgut is the price. A gallon of rotgut will only cost you 4 copper pieces at most low class bars and taverns.
Also this is my 900th post. Huzzah!