The act of cutting off the head of a rat and "neck-fucking" it. The term rattus comes from the latin meaning of the rat family. It is best to masturbate this way in an apartment and/or tenant infected with rats. People do this because the insides (blood and guts) of a rat feel like the next closest thing to a woman's vagina. In Dirty Rattus Masturbating, there is no need to disinfect the rat. If you would like to disinfect the rat, please look up "Sterilized Rattus Masturbating".
"I was staying at a cheep hotel in New York City by myself and took it upon myself to Dirty Rattus Masturbate." (infinitive of Dirty Rattus Masturbation.)
by nilano's other friend February 6, 2009
Get the Dirty Rattus Masturbationmug.