Ego-namer

Someone who puts their own name into Urban Dictionary just so that they can make up things about their genitalia size, good personality, etc. Judging by this,you can assume that everything in their posts are completely false. They are also commonly associated with Down Syndrome.

Gilbert:hey look at my definition for my name in urban dictionary that i definitely didnt write
Samantha:fucking ego-namer
Samantha:*leaves and never comes back*
Gilbert:is it because i have down syndrome?