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2.
The inability to care or feel any bit of emotion
Oh, hey look, a flying rat's ass.
I told her last week that I don't give a flying rat's ass
by ACRose15 December 26, 2011
 
1.
Used in a sentence to describe someone who doesn't care or give a crap....
When Pickle asked me if i knew Gatteaux boo boo'd on the flo i told him i didn't give a Flying rats ass.
by JOLE BLON April 26, 2008