Mostly girls do it. They try to smell their own dry stinky saliva from the lips. This smell not exactly works as a pheromones bit its a big turn on for them. It is done pouting lips together and touching upper lip to the tip of a nose so that smell directly enters into nostrils. Most of girls frequently suck their lips inside their mouth just to make a coating of stinky saliva on the lips so that it will produce nice smelling effect once it gets dry. The other reason is just to block the nostrils and smell inside sidewalls of the nose. It also turns them on.
A phrase used when one's finger has recently emerged from their asshole, and the speaker wishes the listener to experience the smell of the speaker's own ass, i.e. that of poo. Used once by Chris Griffin from Family Guy, and parodied by the title of an online game, "Spell My Finger".
Person 1: Hey, man, smell my finger.
Person 2: I know where you're going with this. I don't appreciate that you'd try to fuck me over in this way.
Person 1: Dude, it's not like that. I was just touching some Smencils I have in my pocket.
Person 2: Oh, I've always wanted to know what those smell like. I swear to Christ, it'll be the death of me when I figure out how to attach a smell to a pencil. All right, then... Aaaaagghh! Asshole!
A crude term used to describe the initial whiff of the vaginal area given prior to performing cunnilingus. Also, it is something that Matt Mroch says to Mexican women at liquor stores.