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2.
An acronym for "my life is the fucking best."
"Today, I got the promotion I've been waiting for. MLIFB"
by DSacc May 17, 2009
 
1.
My Life is FaceBook

When one looks for facebook features in every day life and on other networking sites.
-"today, i went on myspace, saw a status i liked and was looking for the like button. for a while. MLIFB"

-"i actually do that same thing on twitter, except i don't look for a like button"
by bleutigre1127 December 30, 2009