meaning the method in which someone or something is traveling is very slow.
"I still haven't gotten that magazine I ordered yet. Is it on the slow boat to China?"
by yimmys85 October 17, 2016
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Describes an activity that although it takes up a great deal of time to complete, it's an enjoyable experience nonetheless, like oral sex when the girl is not in a hurry to finish.
When my old girl started to give me head, I was on a slow boat to china.
by xzybit January 3, 2006
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