Well probably not the shittiest but some people have such low social skills you wonder how they get through life.
I was in labour in hospital with DS and exH got a phonecall from one of his university friends a woman called Louise, I knew her, she was an idiot so I didn't maintain contact.
ExH took the call and told her I was having the baby and she said can I stay at yours tonight as I'm in the area and haven't got anywhere to say.
Of course the idiot said oh ok instead of it's not convenient today.
Anyway off he went to pick her up from the station and didn't drop her off at our house he brought to her to the fecking hospital.
There I was in labour in agony having been induced and they are on the labour ward asking me stupid questions and talking about university.
Finally I said can you please fuck off now Louise as I'm clearly not in the mood for your banal chit chat and I just want to be alone with my husband for obvious reasons, she started crying and exH said look you've upset her now and they both went off only for him to reappear 24 hours later after the birth to tell me off for being so nasty to her that she had gone back home again [:-s]
I mentioned that he now and father and would he like to see his son, he took a look and pissed off again.
Not surprisingly we divorced very shortly after.