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"Must Not"

Abbreviation often confused with the correct term: "Mustn't"

Confusion arises because of the pronounciation and feeling the "t" should be left out.
Colin musn't have been taught English in primary school.

OR

Nelson musn't lock himself outside of his house.
by RockyRocky August 30, 2007
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Aug 1 Word of the Day
the act of texting people while you are pooping
ex. (talking to a friend on fbook chat)

person 1: hey man whats going on tonight
person 2: i gotta go to the bathroom il poopt you

or

person 1: whatsup man what are you doing?
person 2: poopting you
by mr.poopter January 26, 2011
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2
Must not. Emphatically no. Have to not do it. Assuredly huh uh.
When it was a moment of choice she knew she musnt choose wrongly.
by dointhedeal50 January 26, 2009
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