Usage Note
dégueulasse is a very colloquial, mildly vulgar term for anything revolting — food, behaviour, or weather. It is invariable in form (same for masculine and feminine). Learners should note it is firmly in the informal register; dégoûtant is the neutral equivalent for polite contexts.
Examples
"Ce repas est vraiment dégueulasse."
Natural Translation
This meal is truly disgusting.

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