When someone is so fucked up, they head in one direction with a goal in mind but half-way there, forget that goal and wander off in a random direction with or without another goal in mind. Term comes from goldfish in an aquarium acting the same way due to their seconds-long memory.

A term used to reference cannabis/marijuana/weed.

A common occurrence at rock and hardcore shows where an audience member will attempt to mouth along to the song being played but having no idea what the words are. They will often simply open and close their lips in a manner similar to a goldfish.

Similar to catfishing, where a fake person is created to lure people in, goldfishing is when someone fakes being wealthy in order to find romantic partners.
This is especially true of middle-aged men, who use expensive leased cars to hopefully find a 20-something gold digger.
Basically the reason anyone would do this is because they're too insecure in their own socioeconomic standing, and feel the need to act like someone they're not.

The act of "gold fishing" is define as, when a person who has just pour water containing one more "Gold Fish" in ones anus and removes them by anal insertion of some kind.

When a man masturbates, ejaculates skyward, and then attempts to catch his own airborne gob of semen in his mouth. This act is known as goldfishing for the manner in which a goldfish patiently awaits his feeding while swimming vertically, mouth ajar. Men who goldfish tend to be unpleasant, lonely, and simple human beings.

Used when you're forgetting something or have forgotten something. In reference to goldfishes' short/nonexistent memory.