A nickname given to tennis superstar Roger Federer. It is a portmanteau of his last name and The Shredder, the pre-eminent villain from the Teenage Mutant Ninja Turtle media series. It is sometimes used in conjunction when refering to fellow tennis player and rival Rafael Nadal, as one of Ninja Turtles is also named Raphael. Can alternatively be spelled "Shrederer."
"Did you see yesterday's semifinal? The Shredderer was tearing Djokovic a new asshole before Djokovic gave up like a pussy."
by Greg Cujo May 1, 2008
Used seriously: A freak, one who was born defective.
Used jokingly: One who is very strange, unattractive, uncouth, and/or trashy, which could possibly be ascribed to birth defects.

Taken from the novel "The Handmaid's Tale" by Margaret Atwood, where a shredder is one who is the defective product of radiation altered reproductive cells.
All that makeup and bleached hair can’t hide the fact that Megan is a total shredder! That poor girl was born with a big head and has no social skills!
by Laura MM March 17, 2010
*Real name "Oroku Saki", he is the Ninja Turtles' arch-nemesis. Generally described as a man wearing Japanese-esque armor with blades on the wrist-plates, shoulder-plates, shin-plates, and the symbol claw-like blade across his cranium.
"Shredder is cool unless you learned the truth about him in the current TMNT series."
-me
by Dave January 18, 2005
A nickname given to tennis superstar Roger Federer. It is a portmanteau of his last name and Shredder, the pre-eminent villain from the Teenage Mutant Ninja Turtle media series. It is sometimes used in conjunction when refering to fellow tennis player and rival Rafael Nadal, as one of Ninja Turtles is also named Raphael. Can alternatively be spelled "Shrederer."
"Did you see yesterday's semifinal? Shredderer was tearing Djokovic a new asshole before Djokovic gave up like a pussy."
by Greg Cujo May 3, 2008