[logician2u]

Never having tried it, perhaps someone with real-world experience (as in the military stationed in Korea) could enlighten me.

A now-departed co-worker would occasional use the term "deep kimchi" as what I surmised from the context was another way of saying "deep doo-doo". He'd been stationed in Korea with the US Army in the early '60s.

Would anyone with some military time in Korea like to confirm my interpretation? And perhaps offer an example?

Thanks in advance.

[Pelham]

Means exactly what you suspect it means. Kimchi has a pungent smell so GIs subbed it for a more commonly used epithet