You could be considered a middle child or the youngest.
How much older are you then your younger sibling?
4 years older than my younger sibling and 2 minutes younger than my older sibling.
I'd say you could still be considered either one. You're oldest sibling is like 10 years older, right?
Actually more than 10 years older.
Yeah, I'd probably consider you more of a baby then a middle child.
You better watch how you phrase that. PUNK!