You can rub the stain with the inside of a banana peel. Or you can rub it with cold milk. Then, hand wash it.
If the garment is white, soak it in water with bleach and then rub the stain. If the top is colored, soak it in lukewarm milk for quite a few hours and then wash it in water where you have added lemon juice.
For synthetic fabrics, try rubbing the stain with the inside of half a lemon, after you have squeezed out the juice.