be off (one's) food

be off (one's) food

To not be hungry or willing to eat, as due to illness. When I was sick, I was off my food for a week and lost a few pounds.See also: food, off

be off your ˈfood

have no appetite, probably because you are ill or depressed: She’s off her food, she’s sleeping very badly and she can’t concentrate.See also: food, off