Constant whining or negative comments, statements and attitude. Regardless of how great something is this person will always find a way to crap negative all over it. Being around them or reading their comments for too long makes you want to kick kittens. You find them especially on Facebook or other forms of social networking.
(as might be posted on social media sites)

"I should be happy that I just won the mega lotto, but I have to pay a butt load of taxes on the money and will probably die before I can spend it. FML.. sorry to be crapping negative.. I just hate my life."
by MidwesternMamaH December 28, 2011
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Meaning "I'm not kidding." An equivalent of "I shit you not."

Said by the character Glen (played by actor Sam McMurray) in the Coen Brothers' movie "Raising Arizon"
Person 1: Did you hear that Brad and Jen broke up?
Person 2: No way!
Person 1: I'm crapping you negative.
by FelixPen May 26, 2006
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A polite variation on "I shit you not," or "I'm not shitting you," and ultimately, "I'm not lying."
and then he said - I crap you negative - Windows 7 is better then MAC.
by dstikele October 23, 2009
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