Some random kid who definitely was not given the right definition in Urban Dictionary and thinks it's a smart idea to write his own definition.
"Dixant look up your name on urban dic!"
"Wtf is this, I'm going to write my own def"
Dixant is a derivative of two words "dick" meaning penis and "can't". It is used to describe a male who is not able to perform with his penis in bed, and girls refer to him as a loser and impotent.
His dick was not hard, i guess he is just a dixant.