Top Definition
The private school for girls. A marymount girl is exactly what a girl should be: smart gorgeous and slutty.Marymount girls are intelligent, hardworking and usually sacrifice breakfast and sleep for that A+ on an essay or project.
If you see a hot girl on the street whispering and laughing 2 her friend, itsmost likely a marymount girl.
by Sally Undemire May 18, 2008

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