Top Definition
One who engages in sexual relations with a blood relative.
John: My cousin was hitting on me, but I told her I wasn't a blood fucker.
by Melly-Mel December 29, 2011

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a mixture of bloodclut and mother fucker, the biggest insult known in mankind
also known as when a man likes to fuck a gal who is on the blob!
yo josh you bloodfucker
by nathan maxwell May 10, 2006

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