From the album 'Hot Buttered Soul' by Isaac Hayes. The LP held the number 1 R&B album spot for 10 weeks in 1969.

According to a comment on the lyrics (//genius.com/1108119 ), this word was made up by Isaac, and -start quote from Damian v B. (//genius.com/Dyazz):

This word itself doesn’t exist of course, but it does include a few other words:
Hyperbole; exaggerated.
Syllable
Sesquipedalian; a long word with many syllables.
Mistic
Conclusion: Isaac uses a lot of unnecessary long, mystic words.

-end quote

The song titled 'Hyperbolicsyllabicsesquedalymistic' is the second track on side A of the vinyl disc.

The example of how it is used comes from the hook of the song.
by 1º east of greenwich May 21, 2019
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