i'm down - It's a phrase that belonged to Domingo. He's a total down as

It's a phrase that belonged to Domingo. He's a total down ass foo, and he's always in.

'I'm down with that plan? Yeah, Domingo's down with that plan.'

'I'm down with this idea? Yeah, Domingo's down with this idea.'

'I'm down with that life? Yeah, Domingo's down with that life.'