muddy the waters
Confuse the issue, as in Bringing up one irrelevant fact after another, he succeeded in muddying the waters. This metaphoric expression, alluding to making a pond or stream turbid by stirring up mud from the bottom, was first recorded in 1837.
|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|a scrap or morsel of food left at a meal.|
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