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1.
Something that is very tricky. When the English-run coffin ships were leaving Ireland during the famine, they were often overcrowded, and people became desperate to get aboard. Crowds would gather on the edges of the Cliffs of Moher, and, as the ship passed, try to jump on board. Many failed, landing and dying instead in the frigid waters. The English dubbed these attempts "potato flying", and the phrase today has become inextricably linked with attempting and then failing at something.
Person 1: "Hey man, how'd that exam go?"
Person 2: "Pfft, totally potato flew it. That should be one big fat F."

Person 1: "I think I am potato flying at life."
by G_DayStudents February 02, 2011