A female of utmost ugliness who has little or no respect for her outward appearence.
Often a mosag is referred to as a 'veshloz' or a 'munter'.
Mosags frequently enjoy seual encounters with males who are unaware of the females mosagness
Damn woman you a mean ass mosag.
Aint seen mosag like that since '62.
Mmmmmmmmmmmmmosag( said in a distinctive growly voice familiar with users of the mosag word)
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1. A woman who is not blessed with the talent of looks. In other words: A Fucking ugly girl
That bitch is a mosag!!
by jonny February 15, 2005
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The wife of Aragog, the acromantula (giant spider) in Harry Potter.
potter noob: If Aragog had all those children, did he have a wife?
potterhead: Yes, her name was Mosag.
by groganstump March 22, 2018
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