Definitions

1. noun

a black horse, especially one of a particular breed or of mixed breed

“The blackie in the field was known for its strength and agility.”

2. noun

a black cat, especially one with a distinctive coat pattern

“The blackie curled up on my lap and started purring softly.”

3. noun

a colloquial or affectionate term for a person, typically a child or a close friend

“The kids called their friend ‘blackie’ because of his dark hair.”