1. A clown's penis.
2. A term for a funny looking, or irregularly shaped penis.
3. A person behaving in a ridiculous or dick-headed manner.
4. A tasty cake treat marketed by clowns.
"Did you notice Bobo's clowndong was looking a little obvious at little Bobby's birthday party?"
"Did you see Bob drunk and naked at the office luncheon? Man, he's got quite the clowndong!"
"Damn it Bill! Give me back my money - don't be such a clowndong!"
"Mmm - chocolate clowndongs!"
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.