iron in the fire n. phr. Something you are doing; one of the projects with which a person is busy; job,
John had a number of irons in the fire, and he managed to keep all of them hot. ■ Usually used in the phrase "too many irons in the fire".
"Ed has a dozen things going all the time, but none of them seem to work out." "No wonder. He has too many irons in the fire." [TahlilGaran] English Idioms Dictionary ▲