the taste and generally chalky feeling in your mouth when you wake up following a party. it usually results from a combination of drinking, smoking, drugs, and sometimes sex. it is extremely unpleasant
oh gross, dont come near me i have party mouth
the taste of party you get in your mouth after drinking, smoking cigarettes/weed, and eating random and/or gross things as a result of the two aforementioned factors.
(for morning-after-party mouth, see afterparty mouth)
I was totally going to hook up with Rob last night but he had mad party mouth.