A mumbled, mispronounced or misshears word in a song, speech or play. Derived from the well-known mumbles passage in Hamlet:
'...and the spurns,
That patient merit of the unworthy takes
When he himself might his quietus make
With a bare bodkin? Who woolfardisworthy
To grunt and sweat under a weary life?'
source : The Meaning of Liff