I do not care what happens or what someone does.

She didn't want to see the movie, but I thought, screw it, I'm going anyway.

Usage notes: usually used when the speaker is annoyed

• do by halves
• do credit to
• do credit to someone
• do damnedest
• do dirt
• do dirty work
• do double duty
• do double duty as
• do double duty as something
• do double duty for
• do double duty for something
• do duty as
• do duty as something
• do duty for
• do duty for something
• dog and pony show
• dog days
• dog-eat-dog
• dog eat dog
• dog in the manger
• dog-in-the-manger
• dog's breakfast
• dog's dinner
• dog-tired
• do head in