mere trifle
1. An insignificant or unimportant thing or matter. A: "What do you make of the prediction that sales will take a steep drop next month?" B: "A mere trifle—if there is in fact a drop, it should have no bearing on our bottom line for the end-of-year profits." He dismissed the allegation as a mere trifle trying to distract from his campaign efforts.
2. A very small or trifling amount (of something). A: "No thank you, I couldn't eat another bite." B: "Oh, come now, it's just a tiny bit of chocolate—a mere trifle!" A: "I can't believe you would go out and buy a new car without consulting me!" B: "It only cost a mere trifle, so I didn't think you'd mind!"