I'ma means: I'm gonna or I'm going to. Hyphenated to simplify a statement.
I'ma get that man if it's the last thing I do!
How do you know that's what I'ma do?
I'ma about to go postal!
The common miss pronunciation of Kemosabe. Kemosabe is a term of endearment from a character in The Lone Ranger.
Are you going to be ok King Wasabi?
Really supposed to be...
Are you ok Kemosabe?