歇后语 is a unique language form of Chinese.
The allegorical words are composed of two parts. The first part plays a guiding role, like a riddle, and the second part plays a role as a foil, like an answer to a riddle.
In a specific language environment, the first half is usually spoken out, and the second half is hidden.
In this way, we could understand and guess the speaker's original meaning.
歇后语 is similar to fables but much shorter.
How to understand it easily?
歇 means rest. Thus, 歇(v.)后 (prep.)语(v.) means to speak out (the answer or what you want to say) after having a rest (for one second).