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"Big Dick Swinging" is a phrase used to instill a sense of wellness and optimism into ones self before attempting to overcome a challenge for which one is not prepared.
Jill: "Are you ready for the math exam?"
John: "I'm going to walk into that exam Big Dick Swinging!"
by DrBONGhITS420PHD December 12, 2013
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When someone brags about something that isn't worth bragging about
Guy 1: Yo. I just got a new Xbox controller and it's custom.
Guy 2: Big dick swinging.
by 69420yoloswagen69 May 08, 2018
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