A combination of bro and Boba Fett.
It is used when a guy is referring to another one of his guy friends (one of his bros). It can be used at almost any time. It does not have to be used when talking about things having to do with Star Wars, although it will be better understood if your bros are familiar with Star Wars.
guy1: Hey bro, wanna hang out later at my place with all the bros?
A guy who orders a large pizza pie from a Hawaiian pizza place, only to eat half of it and find a large plastic fork in the middle of it. Then calls the pizza place to get half of a pizza for free.
"What the fuck there's a plastic fork in my pizza"
"That's such a Mike Bobaguard moment"
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.