tubbing

noun

1. The forming of a tub.

2. Collectively, materials for tubs.

3. A lining of timber or metal around the shaft of a mine, especially a series of cast-iron cylinders bolted together, used to enable those who sink a shaft to penetrate quicksand, water, etc., with safety.

4. A hazing ritual in which the victim's head is held underwater.

verb

1. present participle of tub