An only slightly politer version of fuck you. For example, When the taxi cut in front of him, he yelled at the driver, “Get stuffed!” [Vulgar slang; mid-1900s]
Words nearby get stuffed
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.