a half-assed job at estimating.
Because I'm not very smart, i just guesstimated instead of actually thinking about it and making an estimate.
by malcom jamal warner January 16, 2007
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1. Originally used by morons who like to make up words, guesstimate is a combination of two words that don't mean quite the same thing; A combination of the words Guess and Estimate that has adopted the meaning of the word guess.

2. To Guess; To draw a conclusion with little or no reason to believe so.
Bob: How high are we on this building?
Mark: I'd say about 10 stories.
Bob: That sounds like a good guesstimate.
Mark: (Silent in awe of Bobs stupidity)
by Coerce1 May 17, 2009
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To estimate. To aproximate the total or amount of a value or object.

Derives and is primarily used by persons with below average IQ in place of the actual word "estimate".
I guesstimate my intellegence to be that of a primate.
by Prof. Jonathan D. Kimball January 21, 2005
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A word that teachers and old ladies use to sound annoying, even though it literally means the same thing as estimate.
Student: Can you show me how to solve this equation?

Teacher: Sure! You start with a little guesstimate, and th-

Student: SHUT THE FUCK UP!
by GotAFuckingUsername August 04, 2015
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A word used by Dr. Cox from Scrubs.
A guess and an estimate.
"My guesstimate would be that you'd make 100 million $ after the first suscription..."
by ;angeeel. April 20, 2009
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To guess instead of actually using any proper way of estimating, therefore using less effort than estimating
It said to estimate in the math question, but I CBF so I guesstimated
by Lissalicious August 31, 2008
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Teacher: Billy, what do you think will happen to the vinegar when we put in salt? Please do NOT guesstimate.
Billy: It will turn into a dog
by iluvtrolling76 February 26, 2019
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