Noun; A numerical measurement of the extent to which a person is a twat. Similar to electrical wattage, the notable difference being that a higher twattage indicates a dimmer lightbulb rather than a brighter one.
A girl/woman who ditches her current commitment, (usually her girlfriends), to be with a man. A man would never ditch a night out with the guys to be with his woman unless she raised a royal stink.
Her Royal Twattage dissed me again last nightto be with that loser Joel and today I saw him with another woman.