A phrase that emphasizes that one is speaking very truthfully or stating a fact in which he truly believes. Literally means that the person would bet his life on the validity of the statement.
"Gotta keep ya cash coming and that's on my life." -Ja Rule, "Wonderful"

"Suge Knight's a bitch, and that's on my life." -Snoop Dogg, "Pimp Slap'd"

"I pissed on your 12-year-old daughter last night, and that's on my life." -R. Kelly, "Your Daughter Drank My Piss"
by Nick D September 28, 2005
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Something you say to someone when they tell you something that doesn't happen to you or didn't happen to you
Friend: "I just lost my blackberry!"
You: "Not my life"
by stamfordallday June 30, 2010
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That is the question you will ask everyday but get no answer till your days are done.
by Nea151rum February 3, 2010
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My Life is scary because you never know what is coming and it’s going to be a mystery
by England October 26, 2018
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My life. a better/cleaner version of our favorite fuck my life or fml...
Lorenzo just told me, he hates me... my life!
by BOB1313 July 21, 2009
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