It’s your funeral
Definition 1 of 1
Pro Tip 1/3Negative Outcome
The phrase implies the decision will result in something bad or regrettable. 
Go ahead and eat that spoiled food, but it's your funeral.
Pro Tip 2/3Informal Warning
It's a casual and somewhat sarcastic way to caution someone without directly advising against it. 
You want to skip the company meeting? It's your funeral, man.
Pro Tip 3/3Personal Responsibility
Using this phrase means the person must deal with the consequences of their choice alone. 
If you choose to quit your job like this, it's your funeral.