I. transitive verb
or gues·ti·mate ˈgestəˌmāt
( -ed/-ing/-s )
Etymology: blend of guess (I) and estimate, v.
slang : to form an estimate of (as future population, costs, employment) without adequate factual or statistical information
II. noun
or gues·ti·mate -_mə̇t
( -s )
slang : an estimate arrived at solely or chiefly by guesswork