He admitted that the signal had been a practical joke.
Is this a practical joke?
In fact, no one had been responsible; it was a practical joke.
It is only funny to the kind of mind which thinks a practical joke is funny.
It would be a rather effective practical joke, though deplorable.
The acts appear to have been meaningless, and were probably done as a practical joke.
They cannot ask us to accept these four clauses as anything but a huge practical joke.
Anything short of that will be a costly and risky practical joke.
