Guesstimate 

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.

Guesstimate by malcom jamal warner January 18, 2007

guesstimate 

An educated guess. A guesstimation is a guess, but at the same time an estimation.

I guesstimated that 95% of people in Zimbabwe think this word is cool.

guesstimate by drew s April 8, 2004

Guesstimate 

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)

Guesstimate by Coerce1 May 17, 2009

guesstimate 

a mix between guessing and estimating.

guess + estimate = guesstimate

its that simple.

me (looking at very confusing non-digital watch without any numbers): I guesstimate that it is about 3:06ish.

guesstimate by isabelle.g.p33 September 11, 2011

guesstimate 

The way stupid people say "estimate". They either think they're being cute or clever, or else that it's an actual word. Since it's not any of these, science has yet to offer an explanation for people who consider use of this word acceptable.

My college trig teacher asked us to "guesstimate" values. I wanted to punch her in the mouth.

guesstimate by mamamooa October 25, 2005

guesstimate 

an aproximation; an annoying phrase likely originating from high school science teachers.

Don't know the answer? Make a guesstimate.

guesstimate by vurp May 1, 2003

Guesstimate 

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.

Guesstimate by Prof. Jonathan D. Kimball January 21, 2005