chuvmey

We don't have a lot of information about Klingon imports (other than the occasional case of Romulan ale and the still mysterious substances qevaS and DIlyum). But it seems likely that they must import coffee. A recently located short note from an interview with Maltz reveals the Klingon word for coffee:

qa'vIn

Okrand acknowledges that it is unclear whether this obvious cognate refers to the beverage itself, or to the prominence of "caffeine" in the brew, or perhaps to both at once.