Someone why chickens out of doing something after promising to do it.
Rachel recieved the nickname sissy mary after dropping outof the class election race.
by Angelika March 30, 2005
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A person who afraid or scared to do something. Also called a baby back bitch.
Adam was a sissy mary because he refused to fix his snow blower on his own.
by sexystephy November 20, 2015
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