Gradoo, also spelled as gradu, means miscellaneous dirt, sludge, grit, or other gunk you’d rather not step in. Reed in Madison, Wisconsin, grew up hearing it in Louisiana from both English and Cajun French speakers. Its origin is uncertain, but one...
soot booger n.— «In informal industry parlance, a soot booger is a crusty buildup of stuff that is in coal, but didn’t burn up in the boiler and is too heavy to float out of the smokestack—the soot. Big globs of it—the boogers—accumulate...
