What does 동서 (東西)는 동서 (東西)이다 mean?

 ANSWER: "East and West (東西) is a thing (東西)."

In both the Chinese and Korean languages, 東西 (동서) can mean "east (東) [and] west (西)," but in the Chinese language, it can also mean "thing" or "things."

That's kind of weird, isn't it?

這個東西不很輕 (저개동서불흔경).
This (這個) thing (東西) [is] not (不) very (很) light (輕).

甚麽東西貴 (심마동서귀)?
What (甚麽) thing (東西) [is] expensive (貴)?

他喜歡甚麽東西 (타희환심마동서)?
He (他) likes (喜歡) what (甚麽) thing (東西)?