Questimation 

One who replies to his or her own question with a
questionable estimation.

Tyrone: Hey Jaquantay, how much do they pay at Popeye's....?

(waiting less than 1 second for response)

Tyrone: ..... Nevermind, I think they pay $25 an hour.

Jaquantay: You crazy! You gotsta stop wit 'yo questimations.

Questimation by flux321 July 8, 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

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

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

questulation 

A statement that is both a question and an exclamation. It has an accompanying mark which was rejected for actual implementation in the English language by the Man.

"Really?!" is a questulation.

questulation by James C May 13, 2005

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

guestimation

Half way between a guess and and an estimation.

Guy1: You were right! Edouard really is an idiot!
Guy2: So, my guestimations were correct! I knew it from the very beginning!

guestimation by Raffik October 27, 2007