It's rude to not eat food your parent has prepared.
Jeff goes downstairs to see that his parents have made soggy, spongy meatloaf for dinner.
Jeff wants his mother to think that he enjoys her cooking.
Jeff scarfs down the meatloaf quickly, ignoring the nasty texture.
Jeff feeds the dinner to the dog when his parents aren't looking.
Jeff's mother sees him eating and beams with pride.
He fools his mother into thinking that he likes meatloaf.