guesstimate 

not a word

"I'm going to just make a guesstimate of the math answer." - clueless person

"haha thats not a word" - smart person

guesstimate by harrystylesyayyyyy October 11, 2018

Guesstimate 

To guess and estimate at the same time.

I guesstimated how long it took me to drive to school.

Guesstimate by Briizy31 April 1, 2019

guesstimate 

when you make a guess/estimate at the same time

civilian: guesstimate how many marbles are in here
pedestrian 1: I guess theres about 30
pedestrian 2: I estimate theres about 50
civilian: you're both wrong! its 40.

guesstimate by A_rh March 6, 2022

guesstimate 

to guess and estimate

he guesstimates the amount of jellybeans

guesstimate by Qball12121 April 27, 2022

guesstimatrix 

Someone who thinks they can estimate cost or duration of a renovation project but who have zero construction experience and really and truly has no clue what is involved. A Guesstimatrix, always a female, is obviously smarter overall than a Guesstimator. Despite this natural female smartitude, Guesstimatrices (plural) have no business estimating costs or duration of projects.

She’s planning another home reno! And we all know it’ll be 300% over-budget and take months longer than planned…next time that Guesstimatrix needs to hire a real contractor!

guesstimatrix by Mandi Harmony June 23, 2021

guestimation

A guestimation is an entirely useless term that resides between guess and estimation.
Know>estimate>guess>unknown

Dude 1: My guestimation is about $1,500 for that car.
Dude 2: ?

guestimation by Transpolar Drift Stream July 20, 2011

Guesstimation 

A guess towards a possible estimation of some sought.

My guesstimation will be for another 3 hours of driving.

Guesstimation by gaetano November 2, 2007