From Brewer. Many years since I saw one.
Sack Race (A). A village sport in which each runner is tied up to the neck in a sack. In some cases the
candidates have to make short leaps, in other cases they are at liberty to run as well as the limits of the
sack will allow them.

Ditto.(incidentally, what is derivation of "ditto"?)
Sackbut A corruption of sambuca. (Spanish, sacabuche; Portuguese, saquebuxo; French, saquebute;
Latin, sacra buccina, sacred trumpet.)
I think I remember this instrument being mentioned in Shakespeare.
Today it suggests steatopygy.

what is derivation of "ditto"?

According to the AHD, you could ask Emanuela.
http://www.bartleby.com/61/96/D0299600.html