Best definition
A very sick person, a narccistic, glib, lying, irresponsible, manipulative, take no responsibility for own actions, lacking any remorse, guilt,

or empathy, and a self-centered, little boy.

He’s such a zydron; he got high on glue and ate every piece of his daughters birthday cake before the party, then he jacked off with his mother’s dirty panties over his head and had the audacity to blame it all on the dog whom he just had lunch with.