shit happens
US /ʃɪt ˈhæp.ənz/
UK /ʃɪt ˈhæp.ənz/

1.
used to say that bad things can happen and there is nothing you can do about it
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I lost my wallet, but shit happens, I guess.
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Our flight was delayed for hours. Well, shit happens.
used to say that bad things can happen and there is nothing you can do about it