1 definition by nemez

1
to do something too soon, especially without thinking carefully about it (Originally used in sports contests that are started by firing a gun. If someone running in a race jumps the gun, they start running before the gun has been fired to start the race.)
He shouted at me before I had time to explain, but later he apologised for jumping the gun (jump the gun).
by nemez January 14, 2011
Get the mug
Get a jump the gun mug for your cat Trump.