No, not the school subject, the game they play in Enterprise! I think they've played it twice to date now, the recurring joke being that (as you have to name a place that starts with the final letter of the place before) they keep mentioning Dralax, next comes "Xanadu" and then an argument about whether or not it counts.
I found it funny when it returned... but did you?
I found it funny when it returned... but did you?