Top Definition
1.) Not Believable.
2.) Something that is so ass-tounding that it is made out to be not believable.
3.) Richard's Word
"I can't find my fork!", Said Bob!
"That's Unbelievable", Reacted Richard.
by sheeps September 09, 2003

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describes those situations when you juts can't understand why someone or something can't do or see the blindingly obvious.

word for the jaw droppingly stupid
why is it a fly can have 200 eyes and still not find its way out of a room?
by screech April 24, 2004

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the most ridiculous thing you have ever heard.
Simon Cowell "gifts" a BMW two days before the principle of a power of attorney clause dies.
"Man, that's unbelievable!!!"
by SluttySlutterSlutfacedFlaffer April 20, 2009

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Something that is very hard to believe
Son: "Daddy, a cow fell on top of me!"
Father: "That is unbelievable!"
by meggiemoo123 March 24, 2015

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The only adjective that football commentators use to describe good football plays.
Commentator 1:"What an unbelievable catch by #87!"
Commentator 2: "I know that was so unbelievably unbelievable!"
Commentator 1: " #87 is Unbelievable!"
by Big titty licker December 13, 2015

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The most non-commital response to a question.
Person 1: Hey man how's it going?

Person 2: unbelievable!

It's totally up to the interpretation of the recipient as to what they think it means. May be the best or may be the worst!
by Higginbothamt March 08, 2010

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1.) Luke & his girlfreind NOT getting into a big ass argument about stupid shit.
2.) Luke not looking at porn for a day.
3.) Luke logging off WoW to fuck his grilfriend.
4.) How to describe something that happens which springs the though, "no fucking way. Stop bull-shitting me."
"I fucked Chirs in the ass," Luke says.
"That's not incredibly unbelievable," Jill replies.
by Jill Job December 26, 2007

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