A younger brother.
More example sentences
- I had two older brothers and a kid brother who kind of looked up to me.
- How does your comfortable, early twenties, middle of the road, suburban US life change when your mum and dad both die, leaving you with responsibility for your kid brother?
- When Kelly figured out her parents were helping her kid brother through an ordeal, she realized they'd do the same for her in tough times.
Definition of kid brother in:
- The British & World English dictionary