The act of having sexual relations with a woman and, as soon as the male takes his pants off, the female sees how small his penis is and starts laughing uncontrollably to the point where tears start to roll down her face.
You: So how'd your night with Hayley go?
Friend: Not so good, man...
You: Oh, sorry to hear that, what happened?
Friend: Well, let's put it this way. As soon as we started to get it on back at my place, she sad clowned.