I am thinking of one person in particular who thinks the world revolves round her, and what's worse is everyone is sucked in by it is up her backside. I know her in RL, although most of this behaviour is on Facebook.
She has one child, a DD of 5, and you would think by how she talks that her DD is the only child in the world, ever. Her daughter has a cold, or a cough or an ear infection and it's a major crisis, with a crisis status and about 500 people wishing her daughter better soon. If she buys her daughter a new dress, again it's on FB, cheesy pics of her daughter modelling said dress. Sometimes she sends round photo texts with a photo of her DD in her new outfit. Her daughter can't just be in a school play, or go to a party, or go to a dancing lesson; it all has to be documented and commented on. They recently had a holiday and she must have done 3 or 4 statuses per day in the month leading up to it, all about the holiday! And then we were treated to about 400 photos when they came back, from a bog standard package holiday, as if they are the only people ever to go on holiday.
This woman also acts like a totally spoilt brat. She is a grown woman in her late thirties and has her parents and her in laws on standby willing to babysit anytime. She and her husband have weekends away at the drop of a hat, lots of nights out for meals etc,yet all she does is moan if there is one occasion where her parents or inlaws can't accommodate her demands. She really doesn't realise quite how much of a charmed life she leads. If anything goes wrong, however minor, such as breaking a nail or a shop not having something she wants in stock, she whinges and whines and makes it into a drama
I find her very irritating and avoid her as much as possible. It's sometimes hard to do as she lives very near me and her DD is at my DD's school but I just find her so dramatic and draining.