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1) Aggressive punitive Act of sneaking into your own home, catching someone else fucking your wife/girlfriend, popping a Viagra, slamming a bottle of Jack Daniels, and then forcibly sodomizing him up the ass while he is still inside your lady. That man becomes the Penis Inbetweenus.

2) Urban dictionary editors who reject your submitted definitions!
Does Urban Dictionary editor's who reject definitions, creating rift between author and audience, can be a real Penis Inbetweenus...
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by Mjolnir12982 February 28, 2018
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