Bump is used when someone wants to post a reply to a thread simply to "bump" it back to the top of the "Latest Posts" list so more visitors will see it. BTTT - "Back To The Top" is used interchangeably with "Bump".
http://www.freerepublic.com/forum/a3a1fed9e6421.htm
So are BTTT/Bump, (these I understand) and Beeber (this I don't) somehow related?