estimate 

To make an educated guess.

I estimate that there I a 10 to 90 chance that I will go to church this week.

estimate by kissit December 13, 2013

EDT (Estimated Drinking Time) 

It's what you wait for after working a 65 hour week

I need beers, what the EDT?

EDT (Estimated Drinking Time) by Lloyd D. March 25, 2005

estimately 

Approximately.
PS: Start using this so we can make it a word and I can argue that I don't get marked down for using it. Thanks.

2.5 + 2.6 is estimately 5 (rounding down).

estimately by #1 bae October 1, 2015

estimate 

A term used by IT staff this typically indicates they have no clue when something will be done.

I estimate the order will be completed by Friday, but in reality, I don't have a fucking clue.

estimate by bobshoe August 18, 2006

under-estimate

an estimation that is too low; an estimate that is less than the true or actual value

I think Kendall under-estimated allen when they went out to the movies.

under-estimate by AKB jr January 28, 2008

Conservative Estimate 

A completely implausible figure made up by a conservative and stated as fact.

Conservative Estimates:

The President's 10-day trip to India will cost $200,000,000/day.

The probability of a cell forming by chance is 10^-58, and any event with a probability of less than 10^-40 is impossible.

Conservative Estimate by Whitey314 April 20, 2011

Estimated Time of Bitching 

When you make your girl angry wait for all hell to break loose

Tristan: Man, I made her mad
Michael: What's the Estimated Time of Bitching? (ETB)
Tristan: I'd say about 5 seconds

Estimated Time of Bitching by Tha Gort June 18, 2017