n.
1.protective covering consisting, for example, of a layer of boards applied to the studs and joists of a building to strengthen it and serve as a foundation for a weatherproof exterior overlay v.
1.put something on top of something else
2.kill by lying on
Idiom of the Day
act as a guinea pig
to allow some kind of test to be performed on someone
I was not happy to act as a guinea pig on the new training material.