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A phrase to describe someone who is too invested, involved, or obsessed. A person who is "too on" tries too hard at whatever they are doing. Although they mean well, the people around them perceive the action in a negative light.
Jamie: Did you see Jessie's shoes today?
Jenn: Yeah she was wearing stilettos to her 8am!
Jamie: That girl is too on!
by jjchillen May 18, 2016
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