Literal Meaning

One who will not undertake a journey on your behalf,packs bananas for your travel food

Implied Meaning

Somebody who doesn't have to perform a certain task, tends to be indifferent to the needs of those who must perform it

Origin

Ripe bananas are not an ideal food for long journeys,if somebody packs them for a long journey, it shows lack of knowledge or it could be an act of malice