adj. One who causes trouble, especially for others - a contraction of "shit stirrer".
Joey just lied to his older sister about nailing her best friend - what a shitster!
by jim October 03, 2003
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That one mother fucker who is never around and always stirs up shit and creates pointless beef between people who don't even know each other or are mates. They do this in hope to receive attention as their parents don't love them. (Also claps after plane lands or a movie ends).

Examples: saying someone is talking shit, making up rumours about who got head from who, someone is fucking someone else, etc.

In general being an absolute fuckhead who's opinion has zero value and has no mates.

Also know as a shit stirrer as they stir up shit and create unwanted and unnecessary beef.
(Person 1 ) The Shitster: "Yo Bazza is talking shit about your cut, bro. " *Lying wanting Person 2 and Bazza to have beef or fight*
Person 2: "Oh yeah he wants some?" *Thinks person 1 is telling the truth*
Person 3: "Nah, 'Shitster' is just making shit up." *Sorting out the bullshittery of the shitster*
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two best friends who become the equivalent of blood brothers, by reflecting on their lives and their shit while they take a dump in the stalls next to each-other...... a strong bond of friendship is formed and remembered whenever either shitster take a shit
M and M are becoming shitsters in the bathroom at barnes and noble by releasing their poop into toilets
by shhhittssstersssss January 13, 2009
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