jack rations
Jack rations are the snacks you sneak in because the army rations are so bad they might as well be a curse. Like bringing candy when your squad is begging for mercy.
I had to hide my lollies under my uniform. The army rations are worse than a maths test.
My jack rations are so good, my mates are jealous and want my job.
The army rations are like being forced to eat a sock. My jack rations are the lollies.