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2.
The only contraction that is of 4 words, "I am going to." Either that or a contraction of 2 contractions, "I'm gonna." (1.)
Not to be confused with "I'm a..." (2.)
1. I'mma get me a cookie.

2. I'm a salsa addict.
by Slightly Off The Ground January 05, 2008
 
1.
Used in place of "I am going to..." Technically should be spelled i'mma but since this is a shortened version, we leave out the apostrophe!
Ricky said, "Imma get myself a power drink and a snack, and I'll be right back."
by Valerie0214 August 21, 2006
 
3.
1) A shortened form of "I'm going to"

2) A shortened form of "I am a"
Business Man: Imma make you big, kid!

Plumber: But, Imma plumber!
by Alexander Pritchard January 02, 2008
 
4.
a nastardization of "i'm going to".

"imma", when used, implies either redneck blood, or an idiot.
Imma rid Iraq of Weapons of Mass Destruction.
by ZE-bear March 24, 2003
 
5.
Wow, just wow. The way illiterate dumbasses, people in a hurry, or children (which really fall in to both categories) say one or a few of the following...
*I am
*I am a(n)
*I will

The way, usualy in text form, people write one of the above.
Max: What are you sposed to be?
Tina: Imma race car driver. Cuz I loves me some NASCAR.

Max: What are you going to do until your mother gets home?
Tina: Imma wait.

Max: What do you think you are doing with all of that money?
Tina: imma gonna spend it
by Quocalimar December 04, 2011
 
6.
Contraction: I Am Going To
I'mma go to the bath room
by Zabrow December 10, 2008
 
7.
Contraption of I am and gonna, commonly used bu Kanye West whilst dissing music videos.
"yo! Your mom looks like crap today!"

"shut up or I'mma smak yo' face!"
by Punkybrewer March 18, 2010