toilet training

Short definition from Wiktionary

Noun

1. 1
   The process of training a young child to use the toilet to relieve themselves.
2. 2
   The process of training a domesticated or pet animal to avoid urinating or defecating indoors and to use designated places instead.
3. 3
   The practice of enforced coprophagy or urophagia.

Verb

1. 1
   present participle and gerund of toilet-train