“光” means “only,” “想” means “to think,” and “青年” means “young people.” This term is quite literal, and refers to young people who have many ideas but never put any of them into action. Either because they are lazy or afraid of taking any risk, their ideal life is thousands of miles away from reality.
Jīntiān zhōngwǔ de zìzhùcān xiǎomǎ chī de kě zhēn bù shǎo。
Xiao Ma ate quite a lot at the buffet lunch today.
Tā búshì tiāntiān shuō yào jiǎnféi ma？Yuánlái shì ge guāngxiǎng qīngnián。
Isn’t he always proclaiming that he wants to lose weight? It turns out he only thinks, but never acts.