firehose /ˈfaɪ.ərˌhoʊz/verb 1forms 3phrases 1 verb1 •To wash something down with a firehose; to douse with a large amount of water (or chemical agent) sprayed from a hose, to extinguish a fire. formsfirehosed · firehosing · firehoses Phrases with firehose drink from a firehoseTo be overwhelmed (with work, information, etc.); to be inundated with an unrestricted or unfiltered amount.