No, nothing in particular, other than the fig-leaf attempt to cover a cuss word's sting by throwing in a few asterisks. Even a myoptic nun knows what is meant by bulls**t. It's bullshit, of course; and it smells as bad with or without the asterisks.
And the asterisks in no way remove the sting. If people are going to be bothered by this tauro-scatological expression, then would they really less bothered if it cloaked in asterisks or other punctuation marks?
My suggestion is: Either write the profanity as it is, or don't use it. The asterisks make the user look coy and sneaky.