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to accidentally make a rude remark without thinking about it.
dude, last named i walked into the house and blanche dubois'd and said "wow, this place is a dump".

you sure blanche dubois'd when you told that girl she had bad acne.
by seditionaries March 13, 2009
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The act of a woman having sex with so many men she practically has an ordinance passed against her and is forced to leave town.
Wow, Jenna is a real Blanche Dubois! i Hear she had to leave Windsor because of her reputation
by pseudonymisastrangeword October 14, 2013
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