red lead

noun2

1. •
   A bright red, poisonous oxide of lead, Pb₃O₄, used as a pigment and in glass and ceramics.
2. •
   (slang, old-fashioned) Tomato ketchup.

   • Saturday/Wednesday morning breakfast beans were accompanied by corn bread and bowls of "red lead" [catsup for you landlubbers]. — 2003