what does "bump" mean?

I keep seeing this in threads and i tried to see if i could find an explanation in faq's , but no such luck. Can someone just tell me? Thanks -dvz

 

Here, hold my beer, Watch this....

BUMP

 

bump

 

Bump your post to the top.

 

Gotcha. Thanks -dvz

 

Yes and here on the HAMB it is a total exercise in futility, a huge waste of time

You bump a thread and in a few hours, (or less ) you will find the post on page 15, a very long ways from the top

 

It is something in the night ...