吃香 chīxiāng has the same meaning as "受欢迎 "(be popular, shòu huānyíng). 香 means fragrance. You can describe a job is 很吃香 because it is in high demand.

You can describe a job is 很吃香, because it is in high demand.

Chinese: 这不是一个冷门专业，毕业后可吃香了。

Pinyin: Zhè bùshì yīgè lěngmén zhuānyè, bìyè hòu kě chīxiāngle.

English: This is not an unpopular major. Graduates could be very popular in job market.