A
variation on the
popular offensive
come back "
shove it" (which is best combined with some
item, or
idea). The
walnuts add an additional
stylistic twang to an otherwise bland insult.
For example:
"You can take your root access privleges and cram 'em with walnuts
It is also suggested to users of this
phrase to occasionaly replace "walnuts" with some other item, like
altoids or
wasabi.