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Also known as 'BBF'; a friend whom you have very little in common with and you act on your best-behavior when you're with. A best-behavior friend does not typically know the extent of your true character or transgressions because you misrepresent the truth to make yourself look good or innocent. A person with a best-behavior friendship may see the friendship as important or long-standing and so lying about situations or leaving out key facts becomes common.
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