When a woman with a flabby ass presses it into your face. This could be done to anally motorboat, perform analingus or cunnilingus. Can be used in both a positive and negative sense.
"How did things with that girl go last night?"
1) "They went well until she gave me the ass potato pancake"
or
2) "It was pretty dull until she gave me the ass potato pancake...then it was awesome!"
An older woman's ass that is rotund and full of cellulite dimples. When they sit down, the ass seems to squish and go all over the place, as if they were sitting on a pile of mashed potatoes.
My sixty-five yearold teacher has a mashed potato ass. It is very distracting.
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.