Where's the Vodka

Alright listen up buttercup. This joke is so simple even you can understand it. Someone asks Dmitri where their vodka is, implying that Dmitri might have drunk it or hidden it. It's funny because vodka is a popular stereotype about Russians, and the joke plays on that expectation. Plus, you not knowing this joke is funny makes you a mega-nerd. You look like you have never touched alcohol! Sad!