to flush a joints

Flush \Flush\, v. t.
   1. To cause to be full; to flood; to overflow; to overwhelm
      with water; as, to flush the meadows; to flood for the
      purpose of cleaning; as, to flush a sewer.
      [1913 Webster]

   2. To cause the blood to rush into (the face); to put to the
      blush, or to cause to glow with excitement.
      [1913 Webster]

            Nor flush with shame the passing virgin's cheek.
                                                  --Gay.
      [1913 Webster]

            Sudden a thought came like a full-blown rose,
            Flushing his brow.                    --Keats.
      [1913 Webster]

   3. To make suddenly or temporarily red or rosy, as if
      suffused with blood.
      [1913 Webster]

            How faintly flushed. how phantom fair,
            Was Monte Rosa, hanging there!        --Tennyson.
      [1913 Webster]

   4. To excite; to animate; to stir.
      [1913 Webster]

            Such things as can only feed his pride and flush his
            ambition.                             --South.
      [1913 Webster]

   5. To cause to start, as a hunter a bird. --Nares.
      [1913 Webster]

   6. To cause to flow; to draw water from, or pour it over or
      through (a pond, meadow, sewer, etc.); to cleanse by means
      of a rush of water.
      [Webster 1913 Suppl.]

   {To flush a joints} (Masonry), to fill them in; to point the
      level; to make them flush.
      [1913 Webster]