To be mogged is seen as a bad thing within the looksmaxxing and blackpill community.
Let's start with mogging someone. Mogging someone is where you generally look better than someone else. For example if you were taller than someone you would be "heightmogging" them, however it all generally falls under the term "mogging".
To be mogged is being on the other end of mogging or you could say to be the victim. If you are mogged by someone this means that someone in your presence looks better than you do.
"Barret just absolutely mogged shami"