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Use "dirtying" in a sentence
"It's what we call dirtying the victim in this case."
"If that's all you're concerned with, then there is not much point in dirtying a glass at all -- might as well just take a couple belts right from the bottle."
"The sad part is, she has succeeded in dirtying up Obama to make herself look better little does she know that she just handed McCain the presidency in the process."