accident waiting to happen

accident of birth

A fact, situation, or personal characteristic, which may be desirable or undesirable, resulting from the circumstances into which a person was born, and which is therefore entirely beyond their control.

couldn't happen to a nicer

Sarcastically asserts that those in question thoroughly deserve their fate.

happen along

To arrive by chance; to occur by happenstance.

have an accident

To urinate or defecate somewhere other than a toilet.

make happen

To realize, to cause or bring about a thing.

ready and waiting

Already prepared for action or use.

waiting game

A strategy or course of action in which one or more parties refrain from direct action until circumstances change in their favor.