Be asking for trouble
Definition 1 of 1
Pro Tip 1/3Risk Implication
The phrase suggests that an action increases the chance of encountering problems. 
Not wearing a helmet while riding a bike is asking for trouble.
Pro Tip 2/3Negative Outcome
It is used when an action is likely to lead to a negative or undesired result. 
Skipping class before the exam is asking for trouble.
Pro Tip 3/3Hindsight Warning
Often used in hindsight to explain why certain actions led to predictable problems. 
He ignored all the warning signs, which was really asking for trouble.