Farty McPoopbottom's usually tend to be somewhat overweight, but there are rare occasions when a normal size person may become a Farty McPoopbottom.
Guy 2: Yeh seriously.
Guy 3: Hey did either one of you guys go in the bathroom at all? Smelled like Farty McPoopbottom in there.
Guy 2: Yeh it made me wana throw up it was so bad.
Guy 1: I didnt really think it smelled that bad.
Guy 3: Yeh well look at what your mom does to your home bathroom on a daily basis, no wonder it didnt smell that bad to you.
*Guy 1 punches Guy 3 in the face*