get off one's duff

get off one's duff

Get moving, become active. This slangy idiom uses duff in the sense of buttocks, a usage dating from about 1840 and at that time considered impolite. It no longer is, at least not in America, and if anything this cliché is a euphemism for still ruder synonyms, such as get off one’s butt or get off one’s ass.
See also: duff, get, off
The Dictionary of Clichés by Christine Ammer
See also:
  • go off one's chump/head/rocker, to
  • pratfall
  • get a load of something/someone
  • something else, he/she/it is
  • tree hugger
  • push up daisies, to
  • lower the boom, to
  • for the birds, it's/that's
  • cool!
  • lot of hooey, a