(verb) The act of being a nuisance.
Person1: sorry msn's being a spazz
Person2: msn does that sometimes, it's almost sentient in its nuisancery.
Nuisancery means what you are doing is being a complete and an utter nuisance and you can use Nuisanceries if you can which means that more than one person is being a nuisance.
'I am always doing some sort of nuisancery at school or at home, even the teachers hate my nuisancery.'