dally over something
to waste time or take too long doing something. Don't dally over your food. Eat your dinner. I wish you wouldn't dally over your homework.
dally with someone
to flirt with someone; to waste time with someone of the opposite sex. (Old.) Sam is dallying with that Johnson girl again. Stop dallying with her and get back to your studies!
dilly-dally (around) with someone or something
to waste time frivolously with someone or something. Stop dilly dallying around with your friends. He is always dilly-dallying around with his work.