i'm down for whatever - They're saying they'll do anything you want, even if it's so

They're saying they'll do anything you want, even if it's something gross like eating your leftovers or getting tied up in a closet.

'I'm down for whatever' when he asked if he could try your grandma's meatloaf again.

'I'm down for whatever' after she saw his tattoo of a dancing chicken.

'I'm down for whatever' when he said he'd wear a banana costume to the party.'