mouthdouche
What some people call mouthwash -- a liquid (frequently composed of a high percentage of alcohol which often causes a burning sensation) that you swirl around inside your mouth and spit into the sink approx. half a minute later.
{Greg}: Suze, can you please pick up a bottle of mouthdouche while you're at the store?
{Susan}: Sure thing Greggo!!!
{Susan}: Sure thing Greggo!!!