dabble at (something)
To do something without much effort or enthusiasm. I know you're just dabbling at cleaning your room because every pile of clothes is still on the floor. We didn't get much done because we just dabbled at the project all afternoon.
dabble at something
to play at doing something; to do something halfheartedly. Don't just dabble at your history paper. Settle down and do it right. She dabbles at painting.