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What one says when confronted by a overpowering fishy smell.
or when you see a girl with her legs ajar.
(preferably both)^

Dirives from the big smelly fishmarket in london known as Billings-gate Market.
Damn that Samantha has SERIOUS billingsgate

boy: Billingsagate!!!
girl: Sorry il keep them closed next time :'(.
by Mooshooh May 13, 2011
A vulgar and abusive language intended to condemn a person or action.
He was condemned for using prison billingsgate at the company meeting.
by LiteraryGeek March 17, 2007