A nickname for Crazy Mo's (Mohammed Q. Pedophile, peace was never remotely close to him) imaginary friend, 'Allah'.
Based on the supposedly imaginary character [Snuffleupagus] from Sesame Street, whom nobody could see but Big Bird.
> Crazy Mo asked Snuffallahpagus whether or not he should behead innocent civilians with whom he had a peace treaty. Snuffallahpagus said "Of course, but first rape them and steal their possessions!"