A group of 'adults' who have children and/or are married, who are overly obsessed fans of the overrated 'Twilight' book series. They usually spend their time, neglecting their children, ie. - forgetting to feed them - and also, ruining the dazzle of another, more superior community of 'fans' who go by the name of 'twatlight(ers)'.
"Hey, that kid looks pretty down, underfed and neglected."
"Oh. His mother must be a twimom"