My prefix needs me and you.
My suffix cannot be a man.
My infix needs some food.
My whole can ruin your plan.
1 Answer
You must be
weather.
My prefix needs me and you.
weather
My suffix cannot be a man.
weather
My infix needs some food.
weather
My whole can ruin your plan.
"There's no such thing as bad weather, only inappropriate clothing." --someone whose plans didn't include sun-tanning.
(Also, rain, wind, snow, temperature, ect. can ruin many different plans that take place outside.)