That's still too many syllables. If you abbreviate it any more, you might as well just sing "bnvalbn" and if you're just singing nonsense like that, there's no point in the song.
Is there another song called 'give me joy in my heart' that has a couple more syllables in the first and third lines than the hymn I know? f not, I don't see it catching on
Bring it down,*Pass and move,*Brighton Hove Albion... (12 syllables, because you cut out and)
Give me joy in my heart...