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."

A person with an outwardly dominant, masculine, or aggressive personality, but who also enthusiastically takes on the submissive or "bottom" role in the bedroom.