Teach Me How to Loogie

How to hock a loogie. This is a skill I am in serious need of. I have had this cold for a week and a half. I can feel the mucus in my throat. Coughing brings it up, but not quite far enough to get it out. I just think a good loogie would clean in all out. Dan claims he can hock a loogie. He can show me  but he's terrible at explaining it. Google isn't much better. If anyone out there can help me, I would love you forever.