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I deep sigh or either pleasure, or plain relief.
I quelffed so hard after I finished than math exam.
by Chanc100 March 15, 2016
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2
A deep sigh, or breath, usually either in pain, anger, or pleasure.
"Dude I was so happy to finish that test that I nearly quelffed."
by Chanc100 December 18, 2015
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