General opposites:
* Awful: This is a very strong opposite, implying something terrible or unpleasant.
* Dreadful: Similar to awful, but perhaps slightly less intense.
* Terrible: Another strong negative word.
* Horrible: Similar to terrible, but with a stronger emphasis on disgust or fear.
* Lousy: This word implies something of poor quality.
* Appalling: This word suggests something shocking or disturbing.
More specific opposites depending on the context:
* Dull: If "fabulous" is used to describe something exciting or interesting, "dull" is the opposite.
* Boring: Similar to "dull," but implying something that lacks stimulation.
* Mediocre: If "fabulous" implies something excellent, "mediocre" suggests something average or below average.
* Ordinary: This word suggests something unremarkable or commonplace.
It's important to consider the specific context of the word "fabulous" to determine the most accurate opposite.