1. A word developed to describe a person who has done something shady or is shady.
2. Someone who likes to hit it and quit it all day.
3. Someone who does something or says something that pisses everyone off.
4. A synonym to the slang version of "gay", not literally homosexual.
"Damn do you see that fuckster over there?" - Tim
"Oh you mean that shady guy named Eugene Kim
that looks like Tae Yang?" - Victor
" Stop being such a fuckster Eugene! >:O"
"I'm sorry, but seriously the first time i met that guy Eugene,
I knew he was a fuckster"