Meaning of Jam   Slang, Noun, Verb / Pronunciation: jam also jaa-mu 1. Traffic Jam. Slow moving or very heavy congestion where cars almost don’t move at all. Very common in Kampala in places such as Kampala road, Wandegeya traffic lights, Bukoto, Katwe, Queen’s Clock Tower, Mulago.   Example: I was stuck in jam at Jinja road for […]