Pompalicious has many meanings but it is usually used when someone holds a lot of knowledge on a niche subject, puts a lot of effort into something they love, or even when someone purchases something remarkable.
It is usually used to tease someone for the effort they put into a specific thing.
James: I've read 4 books about the frequencies that occur in the A sharp Major Scale.
Daniel: Damn!! So pompalicious...
Olivia: This is my brand new Opel Frontera 2004 with LPG and hydropneumatic suspension, 144HP.
Tina: Damn!! This car is pompalicious!
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.