Use 'crapshoot' to stress the lack of control over an outcome, highlighting unpredictability. Planning an outdoor wedding in April is a crapshoot because of the weather.
Pro Tip 2/3
Casual Tone
'Crapshoot' is informal and best suited for casual conversations, not formal situations. Starting a food truck in this economy is a crapshoot, but I'm willing to try.
Pro Tip 3/3
Positive or Negative
The outcome of a 'crapshoot' can be unexpectedly good or bad, so it's neutral on its own. This audition feels like a crapshoot — could be my big break or another letdown.