I can think up these all night. Round peg in a square hole. How could a round peg fit in a square hole? Duh. Square peg in a round hole. Actually, I can picture this.
'OxiClean Versatile Stain Remover' What kind of a moron would name something Oxy? Clearly this is an oxy moron.
Grape Nuts, what the hell are those or worse, Grape Nut flakes Special K Captain Crunch Honey Nut Cheerios...cereal brand names are all absurd
Suitcase. You have a case, so you sue. Get it? Yes, I'm looking at my suitcase. I'm trapped in Virginia near Washington D.C.
Fucking little bugs. Clearly, bugs fuck. The oxymoron is that when I squash these fucks on my bright tablet screen in the dark, they squeal, "Moron!"