I don't believe this exists, but all I can think of is the term 'Birthing pants.'  That's all I can see, birthing pants.  Cant.  unsee.  it. ( Although, I do truly love her 'look at my incredible angst and artistry' pose. ) 

Now, that second pair, it just looks like she had a massive blow out.  Next time, don't go for the chili, sweetcheeks. 

But hang on, let me get back to that first number.  If you actually made that hoodie, I will give props to your skills.  If however, you, as I assume, just put it on in such a fashion...let me offer you some assistance: