I appreciate your help guys!

It's funny, I never heard these terms before, interesting.

Wagan: You could only used it in your group of British friends.

Wagan is a British street slang to say: Hey how are you? And it's pronounced like "Wa gwan"

Wagan is Jamaican/Anglo-Jamaican slang for "What is going on?", it's a greeting like hello. H.A.M. is a bit rude! It means "Hard as a motherf*****", generally used to say that something or someone is doing a lot of work. For example "I went H.A.M. with my language revision last night" It's been American slang for quite a while but was made popular by this song: https://www.youtube.com/watch?v=UtoHI0JEfDg Hope that helps!