Earlzilla
An Earlzilla is a woman who thinks she's the most important person at the wedding, even though she's not the one getting married. She will fight you for the last slice of cake.
'I didn't even get a ring! You're getting married and I'm just here to suffer!'
'The venue is too small. I want a bigger venue. I want a second venue.'
'You can't just have a normal reception. It has to be a royal wedding.'