pew-n'-mone-ya

My family always warned me, if I went out without a coat, l'd "catch my death of pew-n'-mone-ya"; l'd already heard of "n'mone-ya" from TV and films, and I assumed the former was a worse or exaggerated variant of the latter. So when I was reading aloud in class (something in which I took pride and excelled at), I was devastated to be corrected by my teacher for mispronouncing 'pneumonia'.