When someone inserts an obscene joke into an otherwise innocent conversation, usually with the point of highlighting their sexual prowess and worldly experience at the expense of others.
C: "I prefer the little one."
K: "Honey, stay with the little ones. Once it gets over 9 inches, it just hurts like hell. And when there's two of them, it hurts even more."
J: "Wow, I think he just did a wreath around you.