2. 'person unaware OF his weaknesses when facing A better competitor' not 'person unaware his weaknesses when facing better competitor'
"Stop being such a d.mo!"
this is a guy or girl who looks jacked in the gym due to lots of gucci muscle workouts, but can't put out any real work. all bark and no bite i.e.. someone who can do bicep curls for days but can't do a power clean. could also be a police officer or operator who spends more time on their hair than learning how to break things and hurt people.