When one does not know the words to a particular tune or song, one may instead insert 'boong dilly' as a viable alternative
"All this talk of getting old is getting me down boong dilly"
or
"Ain't nobody dope as me, i'm just so Boong Dilly"
or
"Ain't nobody dope as me, i'm just so Boong Dilly"
by JamesDilly May 19, 2006