Short for "I've got a" or "I am the" or "I have the" or "I have some" or "I am drinking" or "I will go to (the)". Also spelled "Imta".
Imda feeling that Kyle broke into your house and stole your PC.
Imda King of this Land!
Imda food.
Imda some soda real quick.
For once, maybe imda supermarket. Who knows.