The phrase "absolutely unimportant" is correct and usable in written English.
You can use it to emphasize that something holds no significance or relevance in a particular context.
Example: "While the details of the meeting were discussed, the color of the chairs was absolutely unimportant."
Alternatives: "completely trivial" or "entirely insignificant."
"Hierarchy is absolutely unimportant to me.
The surgeon witnessed many seemingly important people being escorted from the America-China basketball game attended by China's President Hu Jintao and George Bush (who had the good sense to use the pretext of a pre-Olympic press conference to ask for tickets).For the absolutely unimportant people, Beijing seemed a vast trading floor.
Yet the conspiracy theorist in a profound display of ignorance will convince him/herself that such vital findings are absolutely unimportant and rage on with their own lunacy.
Such values as obedience and joyfulness were considered to be absolutely unimportant (see Table 1).
Afterwards, the acquired causes of each crisis were introduced with the following sentence: "How important do you evaluate this event for the occurrence of the crises?" Answers were made using a seven-point Likert scale from 1 = absolutely unimportant to 7 = extremely important.
When I left to write books, the first one about sports, I continued to think about my privileged apprenticeship — about what sportswriters do to make the unimportant feel absolutely urgent.
To say that a healthy diet and exercise lifestyle is unimportant is absolutely ludicrous when we as health care practitioners have the job of instituting health measures for our patients.
MTV writer Josh Wigler noted the week's Fringe case for "delivering an absolutely grotesque mystery of the week — even if the actual plot surrounding the worms was thin and unimportant in the long run".
"That's not unimportant".
