Thursdays, or JEUDI in French where certain girls are not meant to put on underwear. Can also refer to the act of going commando on Thursdays specifically.
Saloni: Ugh I couldn't do laundry yesterday

Kristina: So you have no underwear?
Gemma: You're not supposed to wear underwear on Thursday! You could get thrown out of the club for that!
Saloni: Oh i forgot it was pas de panties Jeudi!
by glamazzle March 8, 2012
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