A communist. Usually someone who follows the philosophy of Carl Marx, or Lenin (Albeit built on Marx). Lenin's book, 'Imperialism:The Highest Stage of Capitalism' is one of the most widely read communist texts. It attacks capitalism and explores ways in which social equity can occur.
Unfortunately Communism as a rule of government does not and probably never will work, as it gives the Government corrupting power. It is a pure contradiction that Russia, Cuba, China and North Korea call(ed) themselves communists, yet all were/are ruled by a dictator.
For this reason equally oppressive figures (to that of the dictators) attacked communism, such as Mcarthy. And henceforth such derogatory terms as 'sneakycommierat' will forever be utilized by the ignorant public, such as the idiot who posted prior to me.
SCR: welfare and donations to charity are good.
CP: shut up you sneaky commie rat!
SCR: what did I say Capitalist Pig?
Used in graffiti, as with the other definitions, it is to steal someones idea/style. Used by true hip-hop loving graffiti heads, the guys that have skill and have the right to critique others work. Not the gangs of filth that spread their messy skribble tags and would die if they ever attempted to design a piece.
'Damn skarab totally bit Rats style' Or 'That piece is a bite off Rats style if I ever saw one'
In an extreme case one may bite your tag name, esp. if you have built a name for yourself.