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1.
To play so poorly or to lose in such an outrageous fashion that only the Chicago Cubs seem able to do.
Wow, my team just walked six straight batters then threw a wild pitch to blow a three run lead, then gave up a grand slam to lose. That is some real Cubbery!

or

That team's Cubbery caused them to not score even though they had the bases loaded an no outs.
by Chad in L.A. August 08, 2007