a stuck-up or snobby person, usually a girl or gay guy.
Alice: Did you see Chandra and her new Gucci purse?

Alex: How could I not? She kept on shoving it in my face. Damn, that bitch is so poosty!
by rebelwithacause911 March 18, 2010
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adj.: nasty, gross, old, dirty, moldy, musty.
In the way that a bucket of dirty water left sitting around in the basement for a year is nasty.
by Sarah McMenomy November 16, 2003
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Hi Jason, like my pink slacks?
Dammit Frank, you look like a poosty.
by Jay Fernandes April 20, 2006
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greek- way of refering to a gay person.
" look at that damn poostie."
by ak harry March 19, 2005
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Literal Greek Definition for poostie is "the taker"
by Levendi October 7, 2011
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Someone who is being cranky or moody, like a girl on her period.
Emily is being so Poosty today.
by Bajdkdncn.&/&2$3&: September 23, 2016
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