One who is always eating pills. One who will indiscriminately eat whatever pills are in the medicine cabinet or in your pocket. Usually the drug of choice for a pill goblin is anything that is habit forming.
Gosh that chick is such a pill goblin, she ate fifteen Valium, ten norco's, and a couple roxy's.
I feel as though you took the cake as the pill goblin for the night by eating 30 Adderall's, and your heart hasn't popped yet! Amazing.
Hide your shit here comes a pill goblin.