When you define a word on the Urban Dictionary and then a few days later someone else defines the same word in a slightly different way and then gets the votes for it.
My friends and I have a new funny phrase so I checked to see if someone had posted it on the Urban Dictionary. It had not been heard of yet so I posted it on Urban Dictionary to see the reaction it would get.

A few weeks later I signed in to check the votes on my phrase and found out that only a few days after I had posted it, someone posted the same phrase as I had thus stealing my word and my fun. I hate word jackers

Thanks you uncreative dickheads, think of something yourself and stop stealing our ideas.
by bw120588 December 8, 2010
Get the word jacker mug.