bagadactyl
n., person who wants to get high on someone else's drugs, upon sight of him/her bringing out a bag of it; a predatory joneser, of pteradactyl like proportions. See also: joneser.
When I brought out the bag I'd just bought, that bagadactyl's eyes were poppin' out of their sockets!
If you buy a phat sack like you did last time, watch out for her -- she's a bagadactyl
If you buy a phat sack like you did last time, watch out for her -- she's a bagadactyl