A person or character who behaves in a "random" or "wacky" manner in an attempt at humor, to the annoyance of those around them.
The term is believed to have originated from the "Vamprie: the dark ages" rulebook for the "the dark ages" roleplaying game, as a portmanteau of the word fish (notorious for their wacky/randomness) and Malkavian (a clan notorious for every member being at least partially insane.)
I'm not a fan of Deadpool because the writers tend to make him a fishmalk, rather than give him an interestingpersonality.
A 'Chaotic Random' character in TTRPGs, typically played by someone who doesn't really care about the game. While the other players work to gain the trust of the king, the Fishmalk runs up and slaps him with a duck. They are no fun to play with.
Ugh, last night's session was the worst. James was a Fishmalk and ruined the campaign.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the USCoast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."
A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.