from OneLook:

Quote:
hogwash
noun: unacceptable behavior (especially ludicrously false statements)


though I like Encarta's better: (especially definition 1)

Quote:
hog·wash

noun
Definition:

1. nonsense: worthless stuff or nonsense ( informal )
What a pile of hogwash!

2. pigswill: leftovers of food that are given to hogs to eat