To cut a long story short
Definition 1 of 1
Pro Tip 1/3Conversational Shortcut
Use it to skip details in casual talks, showing only the outcome or conclusion matters. 
To cut a long story short, they got married in Vegas.
Pro Tip 2/3Suspense Breaker
It can reduce suspense by revealing the end of a narrative abruptly. 
To cut a long story short, the dog found its way home.
Pro Tip 3/3Unexpected Outcome
It's often used to introduce a twist or surprising event in the storyline. 
To cut a long story short, I turned down the job offer.