Disrespecting the linguistic and grammatical style of another in a condescending or patronising manner. Wordplay on disrespect and dyslexia.
Kate: "Don't say antidisestablishmentarianism! There might be hippopotomonstrosesquippedaliophobics about!"
Anna: "ADMIT IT.....YOU COPY AND PASTED BOTH OF THOSE WORDS...."
Anna is DISSlexing Kate. She is dissing her language.
Kate: "You DISSlexing me? Are you disslexing me though? Are you disslexing my family?"