* "The deafening silence was unnerving." (Deafening implies loud, but silence is the absence of sound.)
* "He was a pretty ugly duckling." (Pretty and ugly are opposites, but the phrase suggests a charming awkwardness.)
* "The living dead were walking around." (Living and dead are opposites, but the phrase refers to zombies.)
* "It was a bittersweet victory." (Sweet and bitter are opposites, but the phrase suggests a mix of positive and negative emotions.)
* "My friend is a wise fool." (Wise and fool are opposites, but the phrase suggests someone who is both intelligent and prone to making mistakes.)
Let me know if you'd like more examples!