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When someone who has ran out of credit, or valid ticket/pass, on his/her oyster card causes delay for other people to pass through the ticket barrier (London Underground)
It took me 3 mins to exit the station because of people causing an Oyster jam.
by Dee-Odus December 18, 2008
7 1

Words related to Oyster Jam

jam oyster oyster card ticket barrier travel card