A term used to lengthen the lasting appeal of a "Holla!". Mostly used as a way to show approval of something, the term can also be used at will and does not need to make sense in conversation. A good bro will always reply with a loud "Holla!".
Thomas: Let's go get some ribs, and watch the game.
Christian: HOLLA AMOEBA!
Thomas: HOLLLLAAAA!
Or...
Thomas: Yo, what train are you taking?
Christian: HOLLA AMOEBA!
Amobi is the most fun and lively dude you’ll ever meet...he’s loud and so much fun to be around.
He’s also good looking and knows it which can make him a player but he hardly leaves ladies with a broken heart. He’s responsible and committed and will do anything for the people he loves.