Top Definition
JC Slapper refers to the Welsh Light Heavyweight boxer, Joe Calzaghe.

JC refers to Joe Calzaghe's initials while Slapper describes his style of fighting. Instead of throwing punches like a man with a closed fist he "slaps" while apparently effective, it still makes him a pussy.

JC Slapper, while holding a record of 46-0, his record is highly padded and very protected.
JC Slapper fighting 40 year olds does not make him an All Time Great
by southpaw447 September 26, 2009
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