Green’s Dictionary of Slang

nonsense, rubbish.

1937		J. Curtis There Ain’t No Justice 238: Allsbay. You can’t tell me that.
1943		J. Phelan Letters from the Big House 57: ‘That’s alls-bay,’ interrupted Limpy Joe.
1972		R.A. Wilson Playboy’s Book of Forbidden Words 16: Allsbay Underworld slang denoting disbelief; derived via pig latin from balls. This is probably the best-known pig-latin word in modern American.