A flattering euphemism for a clerk. A
shop-dwelling
peon, particularly one whose interests include magic, fantasy or science
fiction.
Comic
Shop Patron #1 (to the Comic
Shop Clerk): I see you've acquired a signed copy of "David Boring", you are quite the storecerer.
Game
Shop Patron #1 (to the Game Shop Clerk): Glad to see you've purged the shop of all D&D versions greater than or equal to 3.5.
Game Shop Clerk: I think it's what The Gygax would've wanted.
Game Shop Patron #2: You, sir, are a mighty storecerer!