wassailer

from The Century Dictionary.

• noun One who takes part in a wassail or drinking-bout.

from the GNU version of the Collaborative International Dictionary of English.

• noun One who drinks wassail; one who engages in festivity, especially in drinking; a reveler.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun someone who enjoys riotous drinking
• noun someone who proposes a toast; someone who drinks to the health of success of someone or some venture