Sentence:  ‘ “It would be most <WSD>irregular</WSD> Grandpa!” says Miss Cecily frowning and tapping her foot. “Well, we're a pretty <WSD>irregular</WSD> family so that's neither here nor there,” says the old man, impish like. [...] ' 
Meaning of the word marked with <WSD> tags:  nonstandard; not conforming to rules or expectations