A phrase used by youtuber JackSucksAtLife and Rule 1 of Hacker Trolling
"You can't Diddle a diddle boy" or "Ya can't diddle a diddle boy" means
You can't troll a troll, or more specifically you cant troll the Diddle Boy; aka jack
*a staff member of Jack's tries to troll him on his mc server*
Jack: You cant diddle a diddle boy *cute laugh*
Play.skycade.net
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.