Noun
(derogatory) An estimation made without good justification and often biased.
Estimation based on guesses, usually for expedience or because no better method is available.
Source: en.wiktionary.orgThe night I was recognized for 'Daughters' at the Grammys was the night this record started. I knew I had bought the time to learn everything I needed before I started this one. 'Continuum' is not a shot in the dark, it's not a guesstimation. John Mayer