expression, ichidan verb
know the ways of the world; have tasted both the bitter and the sweet
Idiomatic expression meaning to have experienced both hardships and pleasures, and thus be worldly-wise and discerning.
彼は酸いも甘いも噛み分けた大人だ。
He is an adult who has tasted both the bitter and the sweet.
酸いも甘いも噛み分け
Having experienced the ups and downs of life, I'm unfazed by any hardship.