K koo - You let someone walk all over you but you're still chill and

You let someone walk all over you but you're still chill and still cool.

You let your friend take all your snacks and said 'K koo' like you were a snack king.

You let your little brother win the game and said 'K koo' like you were a pro.

You let your teacher give you extra homework and said 'K koo' like it was a gift.