A person who indulges frequently and largely in wine.(noun)
The Century Dictionary (Public Domain)
Use "wine-bag" in a sentence
"The body, streaming blood like a squirting wine-bag, tumbled down on to the courtyard's cobbles."
" As if they were of red wine, you might better have said, replied Sancho Panza; for I would let you to understand, if you know it not already, that the dead giant is a bored wine-bag, and the blood six-and-thirty gallons of red wine, which it contained in its belly."
"Sancho likewise, held his peace, eating acorns, and in the meanwhile visited very often the second wine-bag, which, because it might be fresh, was hanged upon a cork-tree."