A person that likes to feed people.
man "can i buy you dinner?" woman "leave me alone you feedo."
A photographer who specialises in food imagery or someone who routinely posts images of their daily meals. especially those who use arty techniques to disguise the fact that they've just burnt their beans on toast.
Person 1: "I'm getting fed up of that retard posting shots of his breakfast on facebook"
Person 2: "yeah, he's a serious feedo."