Big year old
A person of a young age, but sounds a lot older, there can also be a young year old. A person who's voice sounds a lot younger then it actually is.
Person 1: Woww you're 14 but you sound 20, you're such a big year old
Big Year Old
This is something said by a young child to Fe4RLess during a Fortnite match.
Fearless: how old are you man?
Kid: six!
Fearless: nice to meet you man! I'm seven
Kid: you sound like a Big Year Old
Fearless: nah man I'm sick
Kid: six!
Fearless: nice to meet you man! I'm seven
Kid: you sound like a Big Year Old
Fearless: nah man I'm sick