A saying that is said everyday usually in a non-racial (most of the time) way, this quote is used just to mess around with your black friend, but may still get mad because you said it, however this is a very popular catchy phrase that should get said at the right unexpected moment, and is usually always funny if used at the right time and not exaggerated.
An event kind of like a blue moon, something that doesn't happen very often.
An offer that you can't let go cuz it won't be as good of an offer the next time, if it's even there.
A really hot male or female who is way out of your league that you've admired all your life is a little bit tipsy at a party. And suddenly they find you attractive.
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.