Shit happens
Definition 1 of 1
Pro Tip 1/3Emotional Distance
Expresses acceptance of misfortune without strong emotion, suggesting resilience or detachment. 
Missed the bus again? Well, shit happens.
Pro Tip 2/3Colloquial Usage
Appropriate in casual conversations among friends, but too informal for professional or formal contexts. 
When he told his buddy about the fender bender, he just shrugged and said, 'shit happens.'
Pro Tip 3/3Possible Offense
Can be considered vulgar or inappropriate; be cautious using it around people who might be offended. 
She didn't realize her grandmother would be upset when she said, 'shit happens,' about the broken vase.