It's your funeral humorous informal
A person must take the bad results of their destructive or foolish actions. This expression is used to show one's indifference or lack of sympathy for another's actions. It implies that an action may be so bad that it can result in death.
If he touches my computer without asking again, it's his funeral.
Don't skip any more classes or it's your funeral.
Alright, just let Jane put her trust in that liar. It's her funeral.
To be cautious; to plan ahead instead of taking a risk
None
A legal matter that is very easy to solve
The house owners didn't lock the doors before going out, and that's why they got broken in. This is an open and shut case.