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1.
(Foo.th) A term used to describe a statement made by someone believable, to a group of gullable people, that is a lie; false Truth.
Politician: "I will bring the world to peace and end all war."
Person in crowd: "Wow he is spwewing such futh."
by Webbystottle June 14, 2010
 
2.
Means, Fuck you then hoe.
Girl: Eh, you're ugly. Don't talk to me.
Boy: FUTH, I don't like you anyways.
by Zammorix July 29, 2009