A certain type of guy who may or may not necessarily be a homosexual, but acts and conducts himself in a manner that makes his own mother question so.
Limp wristed and camp. Normally is very stylish and is open to wearing heeled boots. Often a pleasure to have around, but if you saw them out of context from afar you would think “Christ here we go”.
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.
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”
Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.