In 20th century U.S. slang, "kimchi" was occasionally used in the phrase "in deep kimchi" (particularly by veterans of the Korean War), a euphemism for "in deep trouble" and was used in a number of awkward situations.
In Korea, people would bury cabbage deep underground in a pot and put a lid over it. They'd keep the cabbage burried until it fermented and turned into Kimchi. When they un-dug it, the Kimchi would smell very foul. Many Korean war vets began to use the expression In Deep Kimchi for when they were in trouble.