Making my hair "heavier"?

Im a guy and the issue with my hair is that basically its styled by me shaking it up (kinda like beiber i know) but i think because my hair is rather light, its causing the style to pretty much go upwards and stays like that. especially on the sides which i dont want. how can i make it so my hair will fall more downwards after shaking it? (not quite sure how to word this)