Guys guys guys!!
I just pulled off a joke in the campaign I'm running that has been 5 months in the making.
So the party had a quest that had them tracking this one dude who is the servant of an evil dragon. But they were going kinda slow and wondering along with this guy a bit cause they like him (he's inspired by Kronk, so...). But they finally got to a tropical country with a large druid population.
This country uses the fruit of a trees currency instead of paper or metal.
So the conversation goes something like this:
Player ( to the money changer): ok, I've got 120 gold, how much will that get get me?
Money changer: oh! That should be about 2000
P: 2000 what?
MC: 2000 ligma.
P: Ligma? What's that?
MC: Ligma nuts. The currency of this land.
Me, the DM: grinning.
Players: Deadpan stare.
There were so mad the fell for it. It was great.