Lana is "anal" spelt backwards. This is a hilarious way to represent or mention the word "anal" in conversations or innapropriate situations...mainly because it sounds like a girl's name. Speaking from experience, it is also plausible to make many puns related to butt secks
. Knowing the fact that this word is the reverse spelling of "anal" consequently means you will now find it very difficult to keep a straight face when you engage in a conversation with a girl named Lana.