1. Originally used by morons who like to make up words,
guesstimate is a combination of two words that don't mean quite the
same thing; A combination of the words Guess and
Estimate that has adopted the meaning of the word guess.
2. To Guess; To draw a conclusion with little or no reason to believe so.
Bob:
How high are we on this building?
Mark: I'd say about 10 stories.
Bob: That sounds like a good
guesstimate.
Mark: (Silent in awe of
Bobs stupidity)