Fish-fuck describes dirty, low-tide smelling, sunburnt, and otherwise white-trash fidiots, who spend most of their time drunk off cheap beer, chain smoking cigarrettes, and aboard a fishing "vessel" presumably fishing.
At least one fish-fuck is a self-proclaimed "captain," that one in particular ubtained the title: Captain Fish-Fuck.

1. historically, a fishing boat that would fish for pickled herring would come in to dock last. so "coming in off the pickle boat" or "falling off the pickle boat" would mean that you're the last to find something out, and would like an ass for saying it.

2. alternate definition: a cock that's bent in a downward angle when hard.

When a person shits on on top of a glass table, while someone under neath masturbates to it. like as you would watch fish in a real glass bottom boat.

Niggafish is a rare species of fish found in the ocean. they thrive off stealing crackafish food by using violence. If you ever come across a nigga fish swim away quickly or lock your boat doors. Typically 12 inchers.

This is for poop freaks that might not want to go all the way. Person A (the shitter) and person B (the target a.k.a the person "shat" upon) Person B lays under a glass top coffee table while looking up. Person A takes a dump over the persons face, or other appropriate area of choice. Thus simulating being "pooped on" without all the mess. (I belive the smell could still be an issue)
origin: unknown, though based on glass bottom boats used to watch fish .

In Australia it is used usually to describe a Greek, Italian or Leb, as these are the most common ethnics.

Also known as an 'inverted glass bottom boat.' This is when you encounter a girl who is so slutty that vaginal intercourse is completely out of the question. In fact, her level of whore-ness is so great that you have to worry about the disease and infestation that has made its way to her anal-cavity. One condom will not suffice with this bitch, and the risk of breaking a condom while double bagged is too great, so the only viable option is to lay a piece or saran wrap over her asshole before proceeding with insertion. This added layer of protection will help protect against most unwanted diseases.