Mwa is a term that is generally accepted to mean a
broad range of things. Most often
said multiple
times if it is mentioned, such as "mwa mwa mwa mwa mwa." Usually when there is nothing else to say, mwa is a suitable replacement.
Derek: Dude this quiz is going to be
hard.
Sammy: Mwa mwa mwa mwa I know.
Derek: Mwa mwa mwa mwa mwa mwa.
Sammy: (as in reference to being Derek)Mwa mwa mwa I'm getting pit stains!