
Butt ugly
Colloquial Usage
Used in casual conversation among friends, not in formal settings.

I wouldn't say her outfit is butt ugly at a formal dinner, but I might tell you that in private.
Potentially Offensive
Can be seen as rude or harsh; use cautiously to not insult someone.

My brother called my favorite poster butt ugly, and I took offense.
Emphasizes Extremes
Stresses a strong negative opinion about appearance; more than just 'ugly'.

He wasn't just a little displeased; he thought the statue was butt ugly.
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