Definition of "mostest"

git thar fustest with the mostest

1917: anon., New York Times, attributed incorrectly to Nathan Bedford Forrest (the correct quote is "to git thar fust with the most men")

Indeed there are mansions along Beechwood Avenue, including the former home of Pearl Mesta, "the hostess with the mostest."

2006, Nicholas Sarno, God Bless the Squirrel Cage