Definitions:

1. A drunken reveler. NOUN
   • Emily's bacchanalian tendencies were a source of both amusement and concern among her friends.
2. A person who takes part in wild revelry or a drunken partygoer. NOUN
   • The bacchanalians stumbled into the street after the feast.
3. Characterized by or involving drunken, rowdy behavior or excessive partying. ADJECTIVE
   • The wedding turned into a bacchanalian celebration lasting all night.
4. Riotusly drunken merrymaking. ADJECTIVE
   • A night of bacchanalian revelry.

Synonyms:

• bacchanal
• bacchic
• carousing
• debauched
• dionysian
• drunken
• orgiastic
• revelrous
• riotous