Guesstimate 

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!

Guesstimate by GotAFuckingUsername September 7, 2015

guesstimate 

A combination of Guessing and Estimating you find the guesstimate by:
1. Guess
2. Estimate
3. Find the difference between the two.
4. Add them up
5. Divide by two
6. Plus 17
7. Subtract two
ALL DONE

YAY! I solved the problem by using the Guesstimate Strategy!

guesstimate by Grace October 9, 2003

Guesstimate 

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..."

Guesstimate by ;angeeel. April 20, 2009

Guesstimate 

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

Guesstimate by Lissalicious October 18, 2008

Guesstimate 

To guess something very randomly.

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

Guesstimate by iluvtrolling76 February 26, 2019

guesstimate 

an approximation based on calculation

Before you guesstimate, do a little more research on the subject.

guesstimate by The Return of Light Joker May 24, 2010

Guesstimate 

Thats wicked skill after doing and learning so much trash and useless things like scooping ice cream and you become a robot because its so technical and your brain remembers the f its doing.

Basically

its when you can say it will happen this way ,because of your past experiences

How many jellybeans in a bag bro?

I dont know,
Let me guesstimate about 64?

Guesstimate by ©ha@sif February 2, 2018