Meaning/Usage: Making a conclusion without having all the details
Explanation: If you need five pieces of information to come to a conclusion, jumping (or skipping) over 3 of them will cause you to make an incorrect conclusion. This term is often used when an incorrect conclusion is made by someone who didn't have all the information.
I incorrectly blamed Jeff for breaking my phone. I shouldn't have jumped to conclusions.
I thought you took my book. I shouldn't have accused you. I jumped to conclusions.
Will you stop jumping to conclusions. You should get all the facts before you make any decisions.
A:
I'm so mad at Jake. I think he told my girlfriend that I was on a date.
B:
What makes you think Jake told her?
A:
Because he's like that.
B:
He sometimes does stupid things, but you shouldn't jump to conclusions.