groover

groove +‎ -er

groover (plural groovers)

1. (colloquial) One who grooves, or enjoys rhythmic music.
   • 2009 February 17, “CD REVIEWS”, in Toronto Star‎:

     "Saturday Groovers" relishes in smelling "the smoke from the lungs of the Saturday groovers" with jubilant, T. Rex-like swagger, then situates the reminiscence in a present fraught with "heart disease and gout." "

2. (Britain, dialectal, Derbyshire, dated) A miner.

   (Can we find and add a quotation of Holloway to this entry?)

3. A device that makes grooves in surfaces.
4. (US, slang) A small portable toilet often used on multiday river trips in protected wilderness areas, so named because the original versions were metal boxes whose rims left a groove in the skin of the user.
   • 2008 July 7, Fedarko, Kevin, “They Call Me Groover Boy”, in Outside‎:

     During an early river trip back in the 1970s, shortly after this system was developed, the toilet seat was accidentally left behind, the rims of the riser left telltale indentations on everyone's bums, and the box got a nickname: the groover. (Some guides also call it the duker or the unit.)

   • 2011, Heavenrich, Charly, Unimagined Gifts‎, →ISBN, page 18:

   • 2015 July 29, Frazier, Colby, “River of No Return”, in Salt Lake City Weekly‎:

     On the river, the matter of poop is taken care of by a "groover." Nothing special, the groover is a toilet seat set atop a military-surplus ammunition can with a special liner. So named for the days before rafters discovered they could place a toilet seat atop the ammo can and instead sat on the edges of the box, leaving grooves on their hindquarters—the groover is an effective, and enjoyable, way to crap in the woods.

     Some referred to the toilet as the "groover" in honor of the old days when there had been no toilet seat. Instead people would sit directly on the top of the ammo can, leaving telltale grooves in their skin