slagger

From slag +‎ -er.

slagger (plural slaggers)

1. One who slags.
   • 1999, Elizabeth A. Throop, Net Curtains and Closed Doors: Intimacy, Family, and Public Life in Dublin, page 54,

     The proper response to slagging is to laugh at oneself while “getting back” at one′s slagger.

2. One who works with slag.
   • 2009, John Hoerr, Monongahela Dusk, page 255,

     Miravich closes his eyes and remembers his days as a slagger. When a mold is full, a slagger moves in with his tool, a techmological marvel othereise known as a board slightly larger than a two-by-four. He leans out over the track and skims slag off the top of the boiling steel, risking what is called “catching a flyer,” which occurs when hot metal explodes out of the mold, spraying everyone in the vicinity.

• gargles, laggers, raggles