1. Meaning a person being a total cheese-head/scumbag.
2. The worst computer virus that has ever spawned to plague human-kind.
3. To make something things worse than already is. synonymous with sabotage.
4. an anagram for a sexual transmitted disease "Enormous Rectile-Rino Orifice"
Don't you be treating me like erro.
Oh now you did it, you erro'ed your computer.
My docter told me that I had an acute case of ERRO.