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3.
A rat who lives in a sewer with X-box speakers, 5.1 surround sound WoW speakers, Rainbow Six, and a Blue Dickies Jacket. He is also a trainer of the TMNT (teenage mutant ninja turtles) and has a afro.
master splinter has 5.1 surround sound 500 $ speakers.
by Ratfro September 05, 2007
 
1.
A person who looks like a rat, but with the training of the Karate. So in essence Master Splinter is just a Ninja Rat Boy
Ahh! Master Splinter you have honoured us with your presence.
by Maverick October 13, 2003
 
2.
Someone who looks like a rat. Derived from the teacher of the Teenage Mutant Ninja Turtles.
Andrew Bray is master splinter.
by Gumba Gumba February 25, 2004