off shave sth off | ˌshave sth ˈoff sth
1.
to remove a beard or moustache by shaving :
Charles decided to shave off his beard.
2.
to cut very thin pieces from the surface of wood, etc. :
I had to shave a few millimetres off the door to make it shut.
3.
to reduce a number by a very small amount :
He shaved a tenth of a second off the world record.