Someone suggested Branson as a unit of velocity. Well I would agree that this is a good idea but the value would keep changing. It would also change direction from time to time. So that ruins the idea.
Last week just before I got my coat I had the temerity to suggest that a cubic Smoot might be a Smootic. Clearly I was mad, the word should be Smubit.
The Smubit is a very useful dimension as it is about the volume of a Transit van, just about what a student needs when moving house. Alternatively a room of 4-5 Smubits should be comfortable for most students. If you can only get 1 Smubit you are in the cupboard under the stairs.