An affliction which causes people to think they are way hotter than they really are. This affliction often leads to heinous wardrobe choices and/or embarrassing behavior.
Look at that girl strutting around in her three-sizes-too-small jeans with her muffin top
hanging out! She totally suffers from high self esteem.
Did you hear that loser down the hall asked out the hot girl next door? He better check
his high self esteem before her boyfriend kicks his ass!