This occurred in the episode where Apu gets married to "sweet Mint-Julip". What's a yodel???
Homer: Loser.. Loser.. Loser.. $500! Apu! Wake up! I want to buy a yodel and this lottery ticket. I have this much. Apu: I am sorry but you do not have enough for both. Homer: [groans, thinks] I'll take the yodel.