A dirty smiley is when you flick a lighter and heat it up till it's really hot then press it to your skin till it cools off and it leaves a scar that looks like part of a smiley face.
After fucking some random chickin the ass you take the used condom and place it in you buddies mouth. Pour the seman in his mouth then wipe rest of seman on upper lip...
Brett: So what happened with those girls last night?
Chester: I totally gave the Penley sisters the ;{o (Dirty Sanchez emotikon/smiley)
Brett: You're kidding?
Chester: Nope, gave them both the ;{o (Dirty Sanchez emotikon/smiley)