What Does Crab/Crabfat Mean?

Branch: Royal Navy + Army

Definition: This is a term used to refer to members of the Royal Air Force by both the British Armed Forces and the Royal Navy. Why are members of the RAF called crabs? Simply because they do a drill that requires them to move sideways and diagonally, making them look like a crab. There’s another more NSFW reason that has to do with pubic crabs and their colour, which seems to resemble the RAF uniform. Crabfat, on the other hand, refers to the colour of grease (more like the ointment used to treat crabs), which once again looks similar to the uniform. In the context of a relationship, we would take this word to refer to someone that no one should date.

Example: What is it with those two? How do they end up picking the worst crabfat idiots they can find? Are there no more people left on the planet that can entertain them? I’m not attending one more party where they invite another crab to ruin the atmosphere.