1983, popularized 1991 in Persian Gulf War military slang, rough acronym for high-mobility multipurpose wheeled vehicle.
Entries linking to humvee
hummer n.
c. 1600, of insects, agent noun from hum (v.). Meaning "energetic person or thing" is 1680s; that of "excellent person or thing" is slang from 1907. As short for Humvee, attested from 1983.