A contraction of I am.
Source: Webster's dictionaryThe reason I talk to myself is that I'm the only one whose answers I accept. George Carlin
My father was a statesman, I'm a political woman. My father was a saint. I'm not. Indira Gandhi
I'm a slow walker, but I never walk back. Abraham Lincoln
Don't praise my good fortune before i'm dead and buried. Tibetan Proverb
When I'm dead, everybody's dead – – and the pig too. Italian Proverb
I'm talking to the door, but I want the walls to hear me. Afghan Proverb