The word "MotherShitter" is a rarely used cuss word which actually has quite the amount of baring in a non-lethal verbal assault.
The meaning of such a word can be best defined by a "shitter of mothers...." A person who's bowel movements have the capability of produce a mother from time to time.
"Wow John....I seem to have misplaced my mother...I can't seem to find her anywhere!!"
2:A person who do excrements on his own mother after being born.
3:Some baby inside his mother because to do excrements, to do excrements on his mother who can sometimes happen(what most person say will be awful but sometimes happens) .
1:"You're a mothershitter!"
2:"Tom pooped on his mother, wow an mothershitter!"
3:"Oh god it pooped in me, mothershitter fetus!"