Lion food refers to anyone in middle management or a similar administrative position.
Two lions escape from the zoo and split up to increase their chances of survival. They meet again after two months and find that one of them is skinny and the other is overweight. The thin one says:
"How did you manage? I ate a human just once and they turned out a small army to chase me -- guns, nets, it was terrible. Since then I've been reduced to eating mice, insects, even grass."
The fat one replies: "Well, I hid near an IBM office and ate a manager a day. And nobody even noticed!"