@open mike - 'Feed Your Babies Onions so you can find them in the dark' was used as a tune title by the wonderful Highwoods String Band (and as the title of their compilation cd). It was used as a generic joke name by the band and I don't believe it was used for any specific tune. Another was (from memory) 'Run for the roundhouse, Maggie, they can't corner you there' and so on.

There may be a tune or song with that title but I don't know them as such.

Cheers, Nick