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A portmanteau of HDMI(High-Definition Multimedia Interface) and TMI (too much information).

When an HD image or video is in such detail that it exposes unpleasant details, usually wrinkles and/or acne, that would normally only be visible in extreme closeup.
"This is not a flattering image, HDTMI no amount of makeup would cover that up. The camera sees all."
by simsilica February 25, 2018
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