A drug user or addict. Hophead is an umbrella term for users of everything from cocaine to marijuana (or 'tea' - which is a jazz era term, not one that originated with the Beats as is erroneously noted elsewhere @ the Urban Dictionary) to benzedrine (aka 'bennies'/amphetamine). The term sprang from the early jazz scene in 1920's/30's America.

Decades later, beer aficionados appropriated the term to refer to themselves (with a wry tip of the hat to it's original meaning).
Mezz Mezzrow, an early marijuana dealer, smoked his own product and was himself a hophead.
by Mike Compton September 23, 2007
Early 1900s term for a cocaine addict. Used frequently in the 1935 drug propaganda film "Cocaine Fiends"
"I gotta have dope. I'm a hophead!"
by AndyStro March 20, 2007
A lover of all beers hoppy. A hophead espouses the merits of India Pale Ales, Russian Imperial Stouts, and other highly hopped beers. A hophead may even chew fresh hops in an attempt to quench his insatiable desire for hops. A hophead would sooner suffer castration than drink the typical BMC (Bud /Miller/Coors) swill.
<Beer Drinker #1> Wow, I just tried Three Floyds' Dreadnaught Imperial IPA. It's a hop orgasm in a bottle.
<Beer Drinker #2> You, sir, are a hophead.
by ugly2 June 11, 2006
Wow, my two roommates are a couple of hopheads. They smoke all the time.
by eebb March 3, 2006
prayer said to the god of intox that good 'product' will come around!
big bull said a hophead's prayer before he went to sleep
by michael foolsley December 3, 2009