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1.
The most uplifting message ever written in a song by Mr. Kelly Jones of Stereophonics.
'Maybe tomorrow/ I'll find my way home'
by Stephen W. Thomas May 13, 2005
 
2.
aka never.

Women often reply to offers from guys with this answer, giving the guy some hope but in the back of her mind she knows its never going to happen.

Usually, when the girl responds she pretends to think about it first and makes a "hmmm..." sound before kindly replying with "maybe tomorrow".
Guy - "Hey girl hey! Want to come over and watch me flex?"
Girl - "Hmmm.... maybe tomorrow."

Example #2:

Guy - "Hey there, can I come with you to your yoga class?"
Girl - "Hmmm... maybe tomorrow."
by kw00w May 22, 2013