loiter over (something)
1. To delay in doing or accomplishing something. Time will be extremely tight in this exam, so don't loiter over any questions you can't figure out. Don't loiter over your decision too long, or they might withdraw their generous offer.
2. To spend a lavish or excessive amount of time doing or enjoying something. I love watching her loiter over each cigarette as if it were the last one she'll ever have. With how frantic life is these days, I think it's important to loiter over things we enjoy, such as good food or drinks.
loiter over something
to dawdle or linger over something. Don't loiter over your meal. I want to start the dishwasher. I wish you wouldn't loiter over your chores.