Pi-Omicron
As we know Kytherians emigrated from Kythera en mass.
Many of these Kytherians, in their adopted countries devised there own words and sayings.
A group of second generation Kytherian-Australians in the 1980's used the would Pi-Omicron to describe something that was "very, very, nice".
It derives from the word "Polloi Oreo".
It was often used in contexts such as "..that particular young lady is Pi-Omicron."
Part of the fun and fascination of using this word was its secret code - unless you were "in" on the meaning of the word - you had no idea what this group was talking about.
"Very, very, nice" - "Pi-Omicron."