T.I.P was his original rapper name and when he got signed he
changed it to T.I. in respect of the rapper Q-Tip. So now T.I. is
like his business man self and T.I.P is his rougher rapper side.
Like a alter ego (You know like Hannah Montana and Miley Cyrus)
:D
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The word "Q-tip" means "Quality tip".
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T.I. doesn't stand for anything. His childhood name was Tip,
that's what everyone called him when he was growing up. So he just
shortened it to T.I. because of the rapper Q-Tip, for respect for
him. =)