Street Trash (1987)

"The ultimate melting movie!" said the promoters of this gem, and they were not lying. With exception of the somewhat more specific Body Melt, nothing even comes close.

Street Trash is simply about a bunch of homeless people that melt when they drink some bad bottles of grog. There's runny remains of melted hobos floating all over the celluloid, and you can practically smell the sap.

Also, as an added bonus, we get to know the lovable king of the dump: woman-beater, bully and all around good-bad-guy; and we get to witness a game of catch with a chopped of penis.

IMDB