Top Definition
Vaginal discharge that a woman gets when she has caught a bad STD and doesn't bathe or get treatment for months.
Man, this chick got a bad case of cunt mustard.
by Defcon One February 12, 2008
An insulting nickname insinuating that somebody is the thick yellow discharge of a highly infected vag.
"Hey Jim"
"Hey Cuntmustard"
by chook23 November 09, 2011
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