1 definition by Pythagorasaur

A form of bidding farewell to a close friend or relative when you know that the probability of ever meeting them again in the future is slim and exceedingly marginal, or when you will cease all contact with the aforementioned individual for a considerable time without sitreps.

The phrase was first brought to public attention after Jim Lovell, aboard Apollo 8, uttered the phrase before going dark behind the Moon for 34 minutes. It was later popularized by mainstream media, such as books or films, where the phrase is occasionally used..
Gerry Carr: "Ten seconds to go. You are go all the way."

Jim Lovell: "We'll see you on the other side."
by Pythagorasaur July 31, 2019
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