someone who buys weed no less than a quarter ounce a time
a weed head would roll blunts daily. Weed heads are generally successful pot heads staying in school and making money.
Kenny: Wtf no, were weed heads
Alex: Smoking purp by the pound, kush by the ounce.
2. someone who acts as though they have used large amounts of weed.
3. Someone who does stupid things/acts a bit screwed up and smokes weed/prefers to be called weed head to crack head.
Can be used in place of "crack head" in most cases, unless you're actually talking about/to someone who does actually use crack.