A term used in central Texas to desribe the odor containing a foul foot smell and an unwashed, yeast ridden vagina. It can also be used as a noun to refer someone who is tainted by this smell.
"Every time my roommate opens her door, it just smells like foossy."
"There goes Johnny, he smells like straight up foossy!"
"Yo, Foossy! When you gonna take shower?"