'To flush a joints' definitions:

Definition of 'To flush a joints'

From: GCIDE

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]