Questimate 

When you try to come up with an estimate for future values that are difficult to project

Let us Questimate the sales / revenue projections for a new product over the next 5 years.

Questimate by Shabski July 31, 2009

Questimation Mark 

This is used when someone asks a very important question. It is the use of a question mark and an exclamation point.

Mary, are you pregnant?!
No but that was a good use of a Questimation Mark.

Questimation Mark by teeners16 November 3, 2010

questamation mark 

The use of both an exclamation point and a question mark together to convey astonishment.

When texting/emailing....
Friend one: I can't believe he hasn't called me!
Friend two: I know! WTF?!
Friend one: Seriously?!
When speaking...Oh my God *questamation mark*

questamation mark by Abigail_BP November 8, 2007

guestimate 

the most fucking retarded word in existance, people get stupider from hearing it

guy one- i just guestimated my income

guy two- your a fucking moron, i hate you, i will kill you and your family you dirty cock monger

guestimate by markie tuckett February 13, 2009

guestimate 

V. To guess and estimate at the same time.

Ok, now guestimate the number of jelly beans in the bowl, Jimmy.

guestimate by Ferrett487 July 8, 2005

guestimate 

To guestimate is when you have no idea about something, but you don't want to sound like an idiot.
Its a careful combination of guessing what the topic is about and then estimating the correct answer.
Also another thing you could add to this is a statistic, as it makes your answer sound more valid and believable!

Paul: so what do you think of the whole el nino phenomenon?
You: in your head, what the FU*K? Thanks paul!
Now you guestimate

Step one guess... Ok so it sounds kinda mexican, doesn't nino mean grandchild? Ok so its something to do with mexicans, sounds like a dance...
Step two estimate an appropriate answer...every one likes dancing and mexicans make good food so I'm gonna like it.
Make up a statistic... 89% of americans think its a positive movement.
Helpful tip: you could always be wrong so answer briefly and not to in depth!
You: well I feel its a positive movement that's changing the world in a dramatic way, 89% of americans see it in a favorable light!
In your head- BOOM how u like me now paul!

guestimate by boomyoulikethat November 14, 2011

Questimation Mark 

The punctuation mark in which there is one or more question marks followed by one or more exclamation points. Usually used for emphasis.

Usage of Questimation Mark:

-- WTF?!?!?!

-- OMG REALLY????!!!!!????!!!

Questimation Mark by What's-her-face! December 30, 2010