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guesstimate

or guestimate

[verb ges-tuh-meyt; noun ges-tuh-mit, -meyt] /verb ˈgɛs təˌmeɪt; noun ˈgɛs tə mɪt, -ˌmeɪt/ Informal.
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verb (used with object), guesstimated, guesstimating.
1.
to estimate without substantial basis in facts or statistics.
noun
2.
an estimate arrived at by guesswork.
Origin of guesstimate
1935-1940
1935-40, Americanism; blend of guess and estimate
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for guesstimate

guesstimate

noun (ˈɡɛstɪmɪt)
1.
an estimate calculated mainly or only by guesswork
verb (ˈɡɛstɪˌmeɪt)
2.
to form a guesstimate of
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for guesstimate
v.

1902, a blending of guess (v.) and estimate. Related: Guesstimated; guesstimating. As a noun, from 1906.

Online Etymology Dictionary, © 2010 Douglas Harper
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Slang definitions & phrases for guesstimate

guesstimate

noun

An approximation based on calculation and guesswork

verb

: Let's guesstimate a yield of four percent (1934+)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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Difficulty index for guesstimate

Few English speakers likely know this word

Word Value for guesstimate

0
17
Scrabble Words With Friends

Nearby words for guesstimate

Ghosting defined