Grog
Grog turns up in 2 fields: refractories, maritime. Here is what it means to the people in each one.
Grog in refractories
Pre-fired clay or crushed brick added as aggregate to cut shrinkage and cracking in refractory bodies.
Calcined fireclay or crushed fired brick used as coarse aggregate in fireclay bricks, mortars and castables, and by potters in clay bodies. Because it has already shrunk during its first firing, grog stabilizes dimensions, reduces drying and firing cracks and opens the structure for better thermal shock resistance. Recycled spent brick is often crushed back into grog.
"Add more grog to the patch mix, it's cracking all over as it dries."
Grog in maritime
A diluted rum ration historically issued to sailors.
Grog is a mixture of water and rum, originally introduced by the British Royal Navy to reduce severe drunkenness and prevent water from spoiling on long voyages. The standard recipe often included lime juice and sugar to make the stale water palatable and combat scurvy. The daily issue of this ration became a deeply entrenched naval ritual until the tradition was formally abolished.
"The chief joked that a daily issue of grog would do wonders for crew morale on this miserable deployment."