1. An expression used to justify an opinion or to qualify a statement. Often used to add validity to one's remark and to encourage others to express their agreement.
2. An abbreviation for "I am saying" or "I believe this to be true" or "Do you agree with my opinion?"
A slang way of greeting someone or saying hello.
It is said and then a handshake is presented by the sayer. You shake the persons hand and then proceed to fist bump them.
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.