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The sigh of relieve and that silly smile a person has after letting out that gas that has been held in for so long.
Slightly changed term from 'Testees' Ssn1 when Peter lets out a huge fart that he thought was a baby and Ron tells him he's got post-fartum depression. Post-fartum expression is easier to relate to.
by Taidi January 16, 2010
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