from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Slang A heavy drinker; an alcoholic.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An alcoholic.
- n. A bodybuilder that uses, or appears to use, steroids and is of poor intellect or by extension any large male.
From juice + -head. Juice is a reference to protein shakes, anabolic steroids, and other performance enhancing drugs, many of which are taken in liquid form and called juice by analogy. (Wiktionary)