Street Trash (1987)

a bunch of homeless people fight each other over money and booze until they stumble across a $1 drink that makes them to melt into a puddle of neon goo that sort of looks like the toxic avenger. Oh and there’s an unfriendly homeless Vietnam vet with ptsd named Bronson who lives in a junkyard and cuts off a guys dick. I think a fat guy fucks a dead girl too. The end.