1. A tramp; a vagrant.
2. A lazy or shiftless person, especially one who seeks to live solely by the support of others.
3. An incompetent, insignificant, or obnoxious person: The batter called the pitcher a bum.
4. One who is devoted to a particular activity or milieu
by definition the only part that pertains to tim is his devotion to a particular activity; faith. tim is a hard worker with goals, abilities, ambitions.
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