This answer explains it.
http://wiki.answers.com/Q/What_is_a_malapropism
For act 2 scene 4 I don't understand this question. It says what malapropisms does the nurse use?
2 answers
Here are a couple of sites on malapropisms. Very simply, they are a funny misuse of words.
http://www.fun-with-words.com/malapropisms.html
Check this page.
http://nfs.sparknotes.com/romeojuliet/page_122.html
http://www.fun-with-words.com/malapropisms.html
Check this page.
http://nfs.sparknotes.com/romeojuliet/page_122.html