A jackhob is somebody who gives and takes of semen orally. It is a concatenation and contraction of 'jack' for masturbate and 'hobnob' for the sharing of drinks together.
A narcisistic ex or current boyfriend who strings you along and keeps you hopelessly in love with him by telling you everything you want to hear, including, but not limited to, "you are my soul mate", "I've never had a connection with anyone like this in my life", etc. in attempt to fill his black hole of a soul. He is of course incapable of loving anyone but himself.
I changed Aaron's contact information in my phone to read Toxic Jackhole to prevent me from receiving his texts or phone calls.
To clarify, it was Jimmy Kimmel and Adam Carolla who invented the word while they were working on the Kevin & Bean morning show on KROQ.
Ah, those were the days.
Doc, the news guy, is a complete and utter jackhole!!
When you fail at something in life (eg. failing an exam or not getting a job), go home and spend an hour just standing in the shower, propping yourself up against the wall with your eyes on your feet.
Caleb knew the only thing to do after he didnt get prefect was take a failure shower.