The phrase "psyched upon" is often spelled as "psyched up on" or "psyched about" but it can also be spelled with an "upon" at the end. Its phonetic transcription is /saɪkt əˈpɑn/ which means that the first syllable "psyched" is pronounced like "siked" with a long "i" sound, followed by the second syllable "u" pronounced like "uh" and "pon" pronounced like "pawn" with a long "o" sound. The word indicates an excitement, determination or motivation about something.
The phrase "psyched upon" is not a commonly used expression in English, and it does not have a well-established etymology or history. However, it seems to be a combination of two separate elements: "psyched" and "upon".
1. Psyched: The word "psyched" is a colloquial shortening of the term "psychedelic", which originated in the 1950s and 1960s. "Psychedelic" refers to mind-altering or hallucinogenic drugs, particularly substances like LSD, which were popular during that era. Over time, "psyched" developed as a slang term meaning to be excited, enthusiastic, or mentally prepared for something.
2. Upon: The word "upon" is a preposition that indicates a sense of location, time, or an action happening at a particular moment or after a given event.