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2.
1. The French number three
2. Number three in reference to bodily functions (i.e. i have to go number 1)
1. Un, Deux, Trois...(1, 2, 3...)
2. I need to take a major trois! It's starting to prairie dog!
by Krazy K October 19, 2003
 
1.
Cool person. Though in Star Trek the character is not important, in real life she is very lovely hot, unique (even her name is) and smart. You'll instantly want to become friends with her because of her free flowing personality and her way with words. Though she's not the best singer, her dancing and instrument talents are great. She often has dark brown hair and is tall.
Guy 1: So did you meet that girl, she was smart, pretty and nice!

Guy 2: Yeah! I did meet her, she's such a Troi.

Guy 1: Woah! And I think her name is Troi!
by ElegantLove January 02, 2012
 
3.
A person who flips the fuck out when you touch their stuff, even in a benevolent fashion.
I made your bed, man! Don't be a trois!
by jd091 November 21, 2010
 
4.
A worthless person, derived from Star Trek TNG's most worthless character.
Greg: Oh no, Grant is here.
Matt: What a Troi.

Wesley Crusher is a total Troi.
by masterfw May 06, 2009