o.g.
An OG is the first version of something, like the first iPhone or the first kid who actually wore a hat and looked cool.
OG7: The first iPhone was an OG. It was big and slow, but it worked.
OG8: My hat is OG. It's been around since the 80s and still looks good.
OG9: You think that shirt is cool? It’s not. It’s just a regular shirt. The OG shirt is the one you wear on the block.