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Said when a guy who hasn't gotten any in a while strikes out with another girl. Refers to the opening of a jar of peanut butter for the purpose of slathering said peanut butter on one's penis to provide a dog incentive to lick it.
Sexually frustrated man: "I just struck out again! Such a long dry spell..."
Friend: "Might be time to open the peanut butter"
by Wolf13 October 24, 2014
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