I wrote a little perl script that uses jvocuhadju to create random lujvo (and asks you for the veljvo, to practice recognition). I'm astonished by how many of these lujvo make perfect sense--especially the shorter ones.
I'll be releasing the code soon.
A few of my favorites:
Others are... difficult to interpret in the context of the real world.
I will not be surprised if randomly-created lujvo end up in the active vocabulary. I intend to use relbla myself, and baknazre'a is a fine insult (remnazbakni works if you prefer to attack intelligence and character rather than appearance).
mi'e jezrax