A person who should feel ashamed.
Person 1: *EPIC FAILS*
Person 2: Yo, shamedog!
by ThePhantomCorrector May 4, 2011
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The moment you get a semi-erection in a public place.

Note - the term 'shamedog' only refers to the moment this unsavoury trouser bulge has been witnessed my a member of the public.
"Oh Maria, we cannot kiss in public, you will case a shamedog"
by UniqueLeopardess February 24, 2016
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