老大不小 lǎo dà bù xiǎo 🔊 no longer a child (idiom) + Keep this word Meanings lǎo dà bù xiǎo no longer a child (idiom) Its characters 老lǎoprefix used before the surname of a…HSK 3大dàbig; old (in age)HSK 1不bùnot; noHSK 1小xiǎosmall; youngHSK 1