that’s life
From Longman Dictionary of Contemporary Englishthat’s lifethat’s life (also such is life) spokenDISAPPOINTED used to say that something is disappointing but you have to accept it Oh well, that’s life! → lifeExamples from the Corpusthat’s life• But I guess that's life!• But there you are, Mr. K. that's life.• The students shrug; that's life, they seem to say.• Oh well, that's life!